This is the only MMO to promise support for serious group XP leveling (rather than generic quest grinding), a multi/open job system per character, and international servers. I also like the art direction, and I like the combat (encounter design/and ability pace) better than that found in newer MMO's.

On top of that I enjoy Selbina's community quite a bit. The majority of modern MMO's have lost their appeal to me, if I wasn't play XIV I'd likely be doing something more productive with that time not playing another game.