If I may join in this conversation, Sakura is still Sakura. Just because she got older and stronger doesn't mean her personality has changed. In fact, to me, it got even worse because of her teenager hormones. But, I think that's just me.
Also, she is still the tramp that would run off with Sasuke at any given moment because she STILL LOVES HIM! No matter what she says, she does.
Another thing is that she still beats up Naruto! I think that is the main reason. That she just manhandles the poor boy and then wonders why he's so stupid! SHE BEATS HIS FRIGGIN BRAINS OUT!!
However, the point that people hate her hair color. I would understand completely, Pink is anything but attractive to a ton of people. Naruto is action not La-La-Loopsie.
Anyway, that seems to be the reasons on why I hate her and probably sums up what most people would say to this subject as well.
Sorry for butting in, but I thought I should voice my opinion...