I remember I gave up Counter-Strike to play EQ. EQ got boring and monotonous, so I went back to my roots in CS. I gave up CS to play Anarchy Online, then Dark Age of Camelot, which both got boring and led me back to CS. I tried Urban Terror, Tactical Ops, and one other.
I'm still playing Counter-Strike in all it's outdated glory. Although I do enjoy a bit of Starships Unlimited in every now and then, but there's only so much single-player I can handle.
I hope PlanetSide is reeeaal good.
--Ed