I'm mostly into flightsims online, I began with Air Warrior in '95 on AOL. Then WWII Fighters, Red Baron 3D, Dawn of Aces,
Warbirds, Aces High, and Fighter Ace. This past year I've been in closed beta for Fighter Ace 3.
I also play a strat game called Combat Mission through e-mail, best strat game around.
I have played some HL online and have the Day of Defeat mod but havn't tried it online yet.