Probably a toss-up between Quake 3 Arena and World of Warcraft.
I still play Quake 3 most days, though. Last time I had anything to do with WOW, I bought a 3 month subscription and logged in twice.
One thing I like about Quake 3, is that I can start the game and be playing it in well under a minute. It doesn't feel the need to load entire 3D scenes as menu backdrops and generally waste my time, the way most other games do.
I still play Quake 3 most days, though. Last time I had anything to do with WOW, I bought a 3 month subscription and logged in twice.
One thing I like about Quake 3, is that I can start the game and be playing it in well under a minute. It doesn't feel the need to load entire 3D scenes as menu backdrops and generally waste my time, the way most other games do.