Surprisingly, I haven't played too many Final Fantasy games. I've played VII (who hasn't?) and I've played bits and pieces of XII, but I couldn't fully get into XII due to the battle mechanics/system and whatnot. I'd have to say my favorite Final Fantasy game to date is Final Fantasy Tactics Advance. It's a spectacular game from start to finish and it's got one of the coolest stories I've personally seen in any video game.

I would love to play XV eventually!