I agree with the Eve comment. I dont have the time (between work and grad school) to play all the time, but in eve over the last two weeks (14 day trial). I have done some misssions, mined some stuff, travel a lot, and purchased a good mining frig…
You might want to try Eve. It is a space based RPG. You would have to like PvP and want to work in teams, but the world is huge and complex, but that is part of the fun IMO.
Anyway, I have been playing my 14 day trial and have become addicted. …