Runescape is probably that for me. I would sit there for hours just working on woodcutting lol. Plus then I'd have days where I would just go from quest to quest. Defiintely spend a lot of time on Runescape!
I played Maple Story for a while. I went back, and forth between playing it, and not playing it, but it was usually the go to game for whenever I was playing with a group of friends. Other that I think DC Universe was the only other mmo I've played long term.
