But did start playing it when it was Warcraft, Warcraft II and III, then took a huge 7 year break and tried out WoW and still playing it 3 years later. I still have friends ribbing me about being a "Level 7 Bezerker", but damn that game was addicting.
Before that, of course the gamut of FPS games:
Doom, Doom II, Hexen, and Heretic.
I ran MajorBBS/Worldgroup software with a 18 line BBS system that allowed those games to go multi player. Damn those were good times. If I had the money today to set that back up I probably would again - the community and the people were amazing.