I'm playing Fish Tycoon - a fish tank breeding sim. Yeah I know, sounds boring. Surpisingly, it's not...tho it's not the "involved play for hours at a time" kind of game. :D
Quite absorbing even so, IMO...game-time passes whether your PC is on or not...you can do anything else on your puter while it's playing, even play another game, hahaha. Don't turn it on for a while, all your fish die...tho you can turn 'time' off if you think you won't check it a while. Just a fun, simple little sim and your own virtual fishtank. Heh