I'm not quite sure on the figures, but it'd be either IX, X or XII. IX was mainly due to all the mini-games and side quests (Chocobo Hot & Cold, in particular) and trying to make sure everybody had every ability. X was somewhat the ability thing again, but I think it was just general levelling up in order to try and beat the Dark Aeons. I might also include the game when I used every character in every battle (as the EXP isn't divided per character used), which meant that some battles took a really long time because of the swapping and changing. XII was mainly due to the fact that I just really enjoyed exploring the world and doing the hunts. Really feels more like an MMORPG when you're doing things like that!