I'm enjoying War thunder a lot more than world of tanks/warplanes, like others have said it feels way to much of a grind to be fun.
Could try good o' quake live
I played planetside 2, pretty good but for me it felt like it took too long to achieve anything, but maybe that was just my time constraints while playing, I only played it in 1-2 bursts,
Neverwinter, although I haven't tried it, looks like an acctually ok f2p mmo.
Marvel heroes is coming out soon, i'm not sure exactly what it is but I've heard that it got the creator of the diablo games on the development team so i'll be keeping my eyes out for that.
You can easily grab a copy of dota 2, it is a moba so it up to your personal taste really.
I would play tribes ascend more often, if it didn't give me a stupid error when I try to launch it

(the error I get it "tribes ascend is validating" when i launch the game, ive reinstalled it, verified integrity of game cashe, but nothing works, does anyone know how to fix this?)
...and TF2, just try not to get addicted to the whole hat system
