I like FFX, but FFX-2 finally introduced real-time combat instead of turn-based combat. I know some people didn't like that, but I found it a lot of fun. I even tried to go back to FFX afterwards, but the fighting is just too slow and boring. The rest of FFX-2 is pretty much any other FF game. It's got one of the best intro movies I've ever seen in any game, though. That intro is worth the money alone.

(yes, it is that good.)
(oh, and by "best" I mean technically best, not storywise. It could just as well have been a PS3 intro.)