My hate (I wouldn't call it hate though, just dislike, If it was really hate, I wouldn't have double dipped on it -I just checked, I didn't re-buy it on PSN-) for 8 is that I didn't have all that much fun with it.
I didn't like Squall, I didn't like the draw mechanic, the way leveling affected battles, the story didn't grab me (and the ending disappointed me) and I didn't like the way the game looked.
Mind, I'm not saying the game is bad, and I didn't mean that before too, but it is, of the ones I played, the title sitting at the bottom of the pile, thus making it the worst FF I played.