Well since we are deciding who is the biggest nerd, I still play a variation of Age of Empires, only with Star Wars characters, called Galactic Battlegrounds. It is the same engine as AOE and AOM, but I get to use AT ATs...
Of course I don;t always have the time to play a game like that so I also spend a few minutes here and there with Unreal Tournament 2004, which allows me to not only shoot numerous people, but also to run them over with a variety of vehicles. It's an amalgamation of the old Unreal series, and my favorite racing game, Carmageddon...
Def