My greatest fanfic pet peeve is bad grammar and wrong spelling. This just destroys my eyes and my already low enough IQ. Another thing I hate are Self-inserts who are Mary Sue/Gary Stu and suddenly have every person of the opposite gender going after them. Seriously, they just get on my nerves. <.<
Those two combined? The bane of all fanfictions and enough to send me to the psych ward.
Aww... Those are very kawaii. I remember the first time I entered this forum (when I wasn't even a member) and I found a link to a gallery full of NaruSaku pics. Here it is: Naruto x Sakura Gallery
Kidding, of course but I have entertained the idea.
As for Sakura's reaction to finding out Hinata likes Naruto, I can really see her getting all angsty and thoughtful for a bit. Then Tsunade finds out and it's MATCHMAKING TIME! Like any person with sense out there, she ships NaruSaku. Hehehehe...