Forgive me, this would be my first post on this site as I'm from H&E and I'd like to post my own opinions on NaruSaku and SasuSaku.
This debate has been argued for a long time now, and I'm sure everything I'm saying now has been said many times before. There are many subjects I'd like to discuss on, my first being the actuall product of Naruto and how it's basicly a big anime cliche.
Very simply put, main character likes female biggest supporting character but the biggest female supporting character hates the main character. In such, over a period time the feelings between the two individuals changes from not being as one sided. May I remind you, this manga is called 'NARUTO', not Sasuke.
Secondly, I'll put out on the sannin issue. In such, Naruto, Sakura and Sasuke have now all been placed with a sannin of their respective characteristics. Naruto has been placed with Jiraiya as both of them are comical. Sakura has been placed with Tsunade to reflect off on Sakura and Tsunade's temper and their abilities in medical ninjutsu. Sasuke has been placed with Orochimaru, or the traitor of the three, complimenting on Sasuke's more darker character from the rest of his teammates. Now, why would the villan who's only ambition is to kill have time to care about the well being of his peers? He's already told us that he's trying to cut off the relationship between his teammates. Also, Sasuke's respected teacher is Orochimaru. The two are both simular as they are both missing-nins of Konoha, branded as villans in the Naruto community, and both probably don't have much redmeption and have their evil ambitions. Hell, even Jiraiya went after Orochimaru when he left. The students and the teachers are almost exactly the same.
Now, we have chapter 311. Many people claim that Sasuke did not kill team seven because he cared about them. To this I say, hell no. "He's really serious about this!" quote unquote by Yamato. And my personnal favorite, "Do not kill Naruto... You'll regreat it." by the Kyuubi. Pop quiz time, why would the all powerful, all wise Kyuubi no Kitsune say "Do not kill Naruto" if Sasuke had no intention of doing it? There is a thing called Murderous intent. To me, I think Sasuke was scared kittenless by being threatened by the Kyuubi. The Yodaime could hand Sasuke's rear end on a silver platter, but to even the Yodaime who sacrificed his life just to SEAL and not KILL the Kyuubi, would probably make Sasuke shake in his boots.
So far, Sasuke to this day remains a villan of Naruto and has been branded a missing-nin. I also find it hard to believe because I'm pretty damn sure in order for Sasuke's cursed seal to work, he must have Orochimaru. The cursed seal is that of which rivals Naruto's power and Sasuke's power, and in order for the two to remain rivals, Orochimaru must live. It'd be all too easy to take down Orochimaru, then retrieve Sasuke in the confusion, much too easy for Kishimoto. This series is far from over and I believe that Sasuke will stay a villan for a long time.
Because Sasuke's been knocked out the spotlight, Kishimoto now gives the rest of team seven more depth. Naruto is now a very powerful ninja and his personality has changed with his clothes and his abilities. Sakura is now a well-known medical ninja, has seemingly uncanny strength which is contrary to the Sakura from part one, and has become more mature. Even Kakashi has changed to the point on how he has now a Mangekyou Sharingan. Sasuke now... well... he's got new clothes and weilds something of a sword. Other then that, I don't see much change to Sasuke's character.
Also, now with Sasuke out of the picture, Naruto's and Sakura's relationship has grown beyond of what part one would permit. And as I said, this manga is called 'NARUTO' and because 'NARUTO' is the main character, he's probably going to get the biggest female supporting character, at least I think he is. It's all part of the cliche.
As for NaruHina... well... um, I don't see much devolpment between the two. The only cannon part of their relationship was in the chuunin exams, and that was long ago.
Remember, I'm just debating and obviously what I say isn't cannon. All will be revield in due time answering all of our questions.
Alright, let's go over the logic of NaruHina. Hinata is a Hyuuga from the main family of the Hyuuga clan and is the heir to the Hyuuga clan. Surely enough even if Naruto and Hinata's relationship evolved into something more, the Hyuuga clan would not allow the two to see eachother for two reasons:
1. The Hyuuga clan tries to keep their Byakugan bloodline inside the Hyuuga clan, ultimatly excluding Naruto and more possibly to forced marriage.
2: Naruto is the container of the Kyuubi, and surely with the pride of the Hyuuga clan, it'd be almost a disgrace to have their name soiled by the heir to their clan being married to the container of the Kyuubi.
More or less also since we've had little to no cannon parts that promote NaruHina, it is very unlikely.
And do not think I'm here to soley bash SasuSaku as it is more then possible. I'm here giving the faults of the couple. Realize, Sasuke is a missing-nin and a traitor to Konoha. By commiting treason, he has even the ROOT of ANBU on his ass as he's now in the Bingo book. He's an accomplice of Orochimaru who's probably number one in the Bingo Book list. Orochimaru has killed many Konoha citizens INCLUDING the Hokage Sandaime, and has almost killed the Godaime.
Sasuke was responsible for fatally wounding four Konoha Genin including Akimichi Chouji, Uzumaki Naruto, Inuzuka Kiba, and Hyuuga Neji, so he'd have to return to Konoha facing that sentence as well. The elder council wants Sasuke dead, and they have the power to overrule the Godaime and even impeach her from her services.
Also, including that in chapter 311, he assualted Yamato, Naruto, Sakura and Sai; placing team seven's life at stake AND to this day he stays with Orochimaru and has yet to repent to his crimes.
Now, I ask you this: IF Sasuke did come back, would he get off skotch free?
Since this is a SasuSaku vs NaruSaku forum, I'll state some instances between the two.
Naruto - Episode Three (Forgive me, I only began reading the chapters after episode 192.) Naruto tries to find out how Sakura feels for Naruto. He decides to surprise Sasuke, which he succeeds in, and used a Henge no Jutsu to disguise himself as Sasuke. He then continues until he finds Sakura who is daydreaming about her raven haired teammate. She is thinking on how it'd be dreamy if he said, 'You have such a big forehead. Makes me want to kiss it.' She was startled when Naruto walked in and said, 'You have such a big forhead. Makes me want to kiss it.' In such, showing how the two think the same.
Skipping on (since everything else is pretty much fluff) we go to Naruto episode 79-80. In this chapter, Naruto fights for SAKURA, and no one else. Why? This is defenitly debatable. He did say, "They rescued me from that hell, and I'll never let you hurt them." But the only two of his friends there were Sasuke and Sakura. Sasuke was okay and could handle himself. SAKURA on the other hand was attached to a tree by Gaara's sand. And when Sasuke came to interrupt them, he didn't say EVERYONE's okay, he said, "Sakura's okay, Naruto." In this Naruto put his head down and passed out. ALSO, going back a little bit, in order to save SAKURA he was about to sacrafice the one chance he had to meet someone almost EXACTLY like Naruto. The only one who truely knew Naruto's pain was Gaara, and Naruto was ready to give that up if it compromised Sakura's safety. This showing that Naruto was ready to give up everything he had for her safety.
Episode 108 (I think it's 108, if anythng) Naruto fought Sasuke, and Kakashi even said that they both had the intent to kill eachother. THIS showing that Naruto did not feel the same way of Sasuke as he did Sakura as friends. Showing that when he fought Gaara, Sakura's safety was his top priority over Sasuke's.
Episode 110-111. Sasuke leaves the village and leaves a heartbroken Sakura behind him. Sakura alerts Konoha of Sasuke's betrayal and they immediately dispatch Shikamaru, Naruto, Chouji, Kiba and Neji. Before they leave, Sakura confronts Naruto and begs of him to bring Sasuke back. On closer inspection, Naruto's eyes widen and almost shake a bit after Sakura asks of him to bring Sasuke back. After a few seconds in this position, Naruto's eyes dim, almost as if he's realizing something. I believe he thought in order to make Sakura happy, she had to be with Sasuke, not him. He came to terms with that and stretched out his hands with a thumbs up giving her a 'Nice Guy Pose'. Once again, on further inspection, he's arm which is giving the thumbs up is shaking, symbolizing he's hurt in a way. He then says, "Sakura-chan likes Sasuke very much. A pain I know well." This meaning he knows what it's like to love and not have his love returned. His relationship has always been one sided with Sakura as Sakura's relationship with Sasuke has always been one sided. She even clarifies this for us saying, "He's always understood me." And maybe this means nothing but she DID say the same thing as Sasuke before he left saying, "Naruto... thank you." I don't know if it means anything, but this is entirely speculation.
Although episode 139-141 holds much NaruSaku, it's concidered a filler and I will not discuss it.
Naruto Part II Chapter 245: Naruto returns to Konoha, meeting up with Sakura first. On her first examination of the young man, she finds that he's changed and thinks to herself about him in admiration. However, the moment is entirely reuined when Naruto readies to release his ultimate perverted jutsu. This showing that Naruto and Sakura still possess their comical relationship. In later chapters she DOES agree to go on a date with Naruto, showing if anything she does hold feelings for him. This was not in my opinion a friend get together because Naruto was bragging about it to Shikamaru when he passed by.
Naruto Part II Gaara Retrieval Arc: Sakura finds out that Naruto is a Jinchuuriki, and also finds out if the Akatsuki find Naruto and extract the Kyuubi from him, he will die. In such, Sakura instantly worries about her blonde compainion and even almost tells him this. Naruto however walks away before he can say anything. I believe he's been doing this so he thinks he can't get in the way of Sasuke's and Sakura's relationship.
Naruto Chapter 289: This is by far my favorite chapter of NaruSaku evidence. Sakura is on the verge of devistating Sai when she realizes what Naruto said of even to retrieve Sasuke, he'd work with someone like Sai. Sakura repeats what Naruto said to Sai herself and Sai pauses. He then says, "Sakura-San... It's times like this that. Hmm ... How to put it... You're very nice to Naruto-Kun. Where those feelings come from is something that I do not understand. But in a book it said this..."

Personaly, I'd like to see an episode to this and see if he puts emphasis on the word, "Nice". Now, in Sai's tone, he's in a sarcastic mood. Also from future chapters, we see what Sai studies and it's on common emotion. Though this is not fact, and to the way Naruto reacted, I believe simply, Naruto knows what Sai means and does not want to get in the way of Sasuke and Sakura. Or maybe he just was in a pissed off mood at Sai to begin with. This statement could of been taken in many ways, but what -I- belive is that Sai was almost teasing Sakura and Naruto got pissed off, trying not to embarress her.
Naruto Chapter 290-297: So far, this is everyone's favorite NaruSaku piece. Naruto puts his life at stake and harnesses the Kyuubi's power in order to retrieve Sasuke. Kabuto even claims that "This is a fight between to monsters" and how he finds that Naruto would even lose himself to fufill his promise to Sakura. In the end, Naruto loses the fight and even hurts Sakura while transformed. From the resultng damage, Naruto's skin is burnt in what I find, a somewhat gorey way. Sakura tries to heal Naruto but finds that she can't do much and she cries to herself saying that everything she can do for Naruto is so small. Yamato cuts in and claims that no matter how small the things she does, it's the size of her feelings for Naruto that matters. The word 'feelings' can be translated in many ways. However, -I- believe that Yamato meant it in a romantic way by his facial expression and the way he spoke.
And I grow tired of the sibling love theories. I'd really love to see some proof on it. To answer some of the possible theories, I'll say this before someone challenges me to it. Sakura hits Naruto because they are both comical characters., they think like eachother, and since Sasuke being the emotionless person that he is, I don't think that he'll be Sakura's emotional piller that she could cry on.
Another theory to shoot down before someone throws it at me: Sakura mistreated Naruto because everyone else did. Naruto was the 'icky-wicky boy' that no one would want to be caught dead with. Naruto had no friends in the acadamy save Iruka. Not even the boys of his age liked him. Kiba thought he was a dumbass and Shikamaru and Chouji avoided him completely. Sakura being the influentual girl that she was followed the trend. Her motives for this are uknown, but I believe it was a foothold to gain popularity among her peers including Sasuke. A great quote I found of a fanfic describes the theory perfectly, "Naruto told a joke, Sakura dismissed it and claimed that he was an idiot for thinking something like that up. Sasuke said the joke one month later and she laughed like she would never laugh again."
Sakura, like many young girls, are influenced by those around them. Alot of girls thought a certain boy was cool, so did she. They were exactly like fangirls, but Sakura did make it a little into something more. In episode three, she wanted to have Sasuke acknowlage her existance. SHE wanted to be known as Haruno Sakura, the signifigant other of Uchiha Sasuke, the sole survivor to the Uchiha Clan, a martial arts genius. If she was recognized by Sasuke, her social standings would skyrocket, and she'd never be like the girl who hid her forehead behind her hair, afraid of what everyone else thought of her. Why? Because she'd be above them. She would be -the- girlfriend of -the- Uchiha Sasuke, everyone would respect her and she'd be reknown. Sure, she had Naruto acknowledging her existance, but why would she want to have NARUTO do it? The 'icky-wicky boy' of her class in which almost everyone in the village hated? Do you realize how a relationship between the two would compromise her social standings?
This is all theory and I welcome debates but please, for the love of god. Do not give me the whole, "Sakura loves Naruto as a brother" deal. It really irritates me.
Everything else I've spoken in previous debates. Remember, most of what I've written is speculation on my part and like I said before, what I say is not cannon. If someone wishes to challenge me to a friendly debate, I'll respect their challenge and we can well, debate.

I'm sorry if this post was lengthey, but I felt I needed to get my point across. Anyways, continuing the debating, I'm kinda tired~