I am an old school computer gamer. After my C64 days I moved up to a Commodore Amiga 2000. Once I left my parents' house and joined the Air Force, I bought my first PC - a 386SX Packard Bell. This helped feed my flight simulator cravings. I upgraded to a 486-DX solely for the purpose of being able to play Falcon 4.0.
Soon after that, FPS games started becoming more prevalent. Some games that I remember spending countless hours playing (in no particular order): Doom, Quake, Rainbow 6, Tribes, Tribes 2, Quake 2, Quake 3, Unreal Tournament, Unreal Tournament 2, CounterStrike, Half-Life, half-Life 2, Jedi Knight, etc.
When the co-op team-based multiplayer war games came out I was in online gamer heaven: Battlefield 1942, Battlefield Vietnam, Battlefield 2, Combat Arms, the Call of Duty series (loved CoD4 Modern Warfare!). Then I started playing more console games (PS3) because I couldn't keep up with the hardware necessary to play the newest games with the highest settings (I got married and had kids, so my priorities changed for the better.)
But I am seriously thinking about upgrading my PC so I can play the new Battlefield 3 - that one looks awesome. Even though I picked up a FragFX Shark for my PS3, I still prefer the good old keyboard and mouse for FPS games - and that means PC gaming. But I give big kudos to RockStar Games for Red Dead Redemption - that is a game I am just now starting to play on the PS3 and it is stellar!