Right now I'm playing Aliens Vs Predator 2. I haven't played it online yet. I can tell you there is going to be a balance problem with this one. The predator is too powerful! I also play Half-Life, Unreal Tournament, and Quake 3.
They only type of role playing games I care for is anything made by Squaresoft. Chrono Trigger and Final Fantasy. Lately, since FF8, I haven't really been into the games that much. They're too much into making the games have good graphics, and not as concerned with making the stories as good as they used to be. FF8, 9, and 10's stories suck compared to FF6 and 7. They're also too easy. Back in the day, RPGs used to be a challenge.
*end of rant*
Grand Theft Auto 3! I've played that game more than any other game that has ever been created!