Originally Posted by
Jeeqbit
PvP (especially Crystalline Conflict, but some people prefer objective-based Frontline or Rival Wings instead).
Variant, Criterion and Criterion Savage dungeons (currently only 1, there is a new one in a few months).
Triple Triad, where there are over 377 cards to collect from different content and doing card matches with other players. Some of them come from tournaments.
Chocobo Racing, where you rank up a chocobo and then breed it many times to get a high enough ranking chocobo to do all of the chocobo racing challenges. Racing can be fun.
Doman Mahjong is pretty boring, but a few people like it.
Lord of Verminion at the Gold Saucer, which is also not very popular, but it is an entire mini-game of its own.