Sim City. I don't know why but there's something about these games that are so addicting. The newest one they have out (Sim City 4: Rush Hour) Is awesome
I like that little nifty option they give you to drive around your town, for whenever you're bored
: The graphics are great
Most of the time I find it fun to just go back through your city and see all the different buildings around the place. I many times end up with "slums" hehe
Even the orignal rocked bottom
I'll never forget the good times I had with it