I've kinda burnt myself out on FFXIV due to playing it pretty much non-stop for 4 months, and I don't have much to do besides cap soldiery and run ST every week, so I figured I'd find another game to play when I run out of things to do in XIV. I'm considering heading back to Tera, Rift, or Aion. I would install all 3, but I have a very strict bandwidth limit in my current situation and can only install one.
Tera: This one is the most fun for me, combat-wise, but there's really not much to do outside of that. Also my character is starting to get to the high levels, where leveling has slowed down pretty significantly. There's also very little endgame.
Rift: I played the shit out of this before, but I burnt myself out shortly after the game went F2P. That being said, I'm willing to give this another go, but the 50 to 60 grind was pretty brutal. I've also heard that the game's F2P model hasn't really played out too well in a number of ways...
Aion: I haven't played this since its infancy, when private servers were rampant and even still it was still a grind. The game's changed a lot since then, and I'm kinda curious to see for myself how different it is. Also, the game has an interesting looking Bard class, which is difficult to find in a lot of games.
Part of me is also curious to try BnS, but I'm usually not one for getting into foreign games.