Quote Originally Posted by dgb
Nethack - quite possibly the game I have wasted the most time on in my life (and there have been a few which have taken a lot of time).
Argh! I wasted so much time on Angband!!!
It nearly ruined my life at one point.

I'll look into those Ur-Quan Masters, as I used to waste a suitable amount of time on SC2, mostly meleeing with a friend.