And if deep down, in his heart of hearts he truly believed in what he is doing, if he truly would do anything to get revenge, absolutely anything and stop anyone who gets in his way, he would've killed Naruto at the valley of the end. He would've killed him and obtained Mangenkyou Sharingan. Or he would've done it again just recently.
Both times Sasuke wouldn't kill Naruto. I think deep down, in a way, Sasuke wants Naruto to stop him.
Once again I'm gonna have to disagree with you. Sasuke knows exactly what he's doing. He didn't kill Naruto because wanted to spite his brother. And look he got the Mangenkyou Sharingan anyway, so he's proving to his brother he can attain his own power without going the same route.
Sasuke doesn't want Naruto to stop him, he just wants Naruto to leave him alone so he can do his power trip thing in peace. That's why he keeps saying, leave me alone. He hasn't killed Naruto because it hasn't been nessesary. It was clear Naruto was outclassed, so killing him would have been a waste of time.
Hell he said he was going to kill Sai too, for waking him up, and he has no ties to Sai. He didn't do it because killing Sai who was clearly underneath him, would have been wasting Chakra and effort.
I want people to get away from this notion that Sasuke's is a tragic antihero. He's not. He's just selfish. He's been doign what he's always been doing since the begining of the series, what he wants regardless of what everyone else thinks and how it affects them.
You see evidence of this during the Chuunin exam, where Sakura was going to tell someone about his cursed seal, but he slapped her hand down, downright ordering to stay out of it. Or when he decided to abandon the village his family was famous for defending for several generations to join with said village's most nortorious enemy. The same enemy that was responsible for killing the 3rd Hokage. Or when his best friend and classmates all risked their life to bring him back and shuns their efforts.
Its like this, Sasuke's goals and wishes comes before everything and everyone else in his eyes. Its that plain and simple. There is no mystical darkside, clouding his thoughts. (And to be honest, as a StarWars freak, to be technically correct, the 'Darkside' isn't what clouded Anakin's judgement to turn on the Jedi. It was his fear and insecurity of losing Padme that prompted it. The 'Darkside' can't take root if you don't allow it to in the first place. His fear got the better of him. Which is why its always been an important Jedi trait to not allow your emotions to dictate your actions. Anakin Skywalker never learned this basic rule and thus he fell.)
I think the real reason why I'm oppose to this whole Sasuke's given in to his dark ambition and blah, blah, blah. Because that reasoning obsolves him from whatever he's currently doing. Saying, "Its ok, he betrayed his friends and village. He's having a tough time now..." And that's just unforgivable. Like saying you can do whatever you want, because you have an angsty past. I mean that's how life goes sometimes, deal with it.
Naruto had a rough childhood too, on par with Sasuke. But I think his childhood and the many trials he had to go through has made him a better person for it. If anything Sasuke's a victem of having poor character and not a strong enough will. But that doesn't mean, what he's doing right now is ok. And it never should be.