FF 9 sucked total ***. FF 7 I never really liked, until I played it a second time. The first time I played it, it was my first time playing an RPG game, so I wasn't all into the genre and didn't know what to expect. I now own FF7
FF8 was awesome in my opinion. It had one of the best stories, but FF7 did as well.
I actually loved FFX... But FFX-2 is just....odd.. I can't seem to get into that game, I might try playing it again soon, but I don't really want to make the effort.
BTW
Advent Children will roxor your boxors
EDIT: I'll just add, that my girlfriend who likes to play video games, but doesn't own a video game system, fell madly in love with FF10.. She played it a total of 15 hours in a matter of a few days. I know that's nothing to hardcore gamers, but someone like her, it actually surprised me.... She beat the friggin game for me...