Uninteresting main character, even less interesting main villain, weak supporting cast, mediocre at best story, lack of art direction are the reasons I was never a fan of 7. The most infuriating thing was that ending with Red XIII that made absolutely no sense at all. Nothing I haven't said before when the topic comes up.
I also tend to notice that amongst 7's praises, it being the person's first Final Fantasy game tends to show up.
FF7 is overrated, but it's still a solid game. Revolutionized both the franchise and the style of the RPG itself, a good challenge, and an overall fun game to play through.
The Final Fantasy series has been dead to me since X-2(most unnecessary sequel ever). They made an online one and gave it a number(I could have accepted it if it had been called simply, "Final Fantasy Online" or something like that), then they made one that threw out all the things I loved about the franchise(I want my goddamn turn-based RPGs back!), then they made one that, as far as I can tell, seems to focus far and away too much on graphics, and not enough on being a good game. Why are graphics important in an RPG? Who the hell plays an RPG for the way it looks? One of my favourite RPGs is Dragon Warrior 2, looks like sh*t, but it's an amazing game.
My personal favourite is a tie between VIII(my first, if you don't count Mystic Quest, which no one does), and VI. Great gameplay, good stories, amazing re-play potential.
There's been this shift in modern gaming where it seems like it's more important for a game to look good, than it is for the game to actually be good, and I hate it.