I used to love getting some friends together to run a DotA map. Like Boner says, even though it's technically a mod for WCIII, the champion-centric combat means you don't have to micromanage everything, and you get faster gameplay. It can be a ton of fun. There's a stand-alone DotA II that should be out by sometime next year (not being developed by Blizzard), I think. A lot of folks are really excited about it.