FFXIII looks like a really awesome game. As long as the ps3 doesn't flop....
Anyway, the only RPG I liked better was Threads of Fate.
Of course, many would disagree with me. The few who have played it would say that it was the worst RPG to ever be seen by mankind, but it's my favorite game. There's a lot of good RPG games, but other than Threads of Fate, FF is my favorite.