I remember pirating Quake, got it in August before the Nov launch (gotta love early 0-day releases) and playing the hell out of it. Played so many mods and the early machinima mods. By the time Quake 2 came out I had money to buy the game and did so, great game. I setup my first Ethernet network between two machines and the first thing I did was call a few friends over for 1v1 Quake 2 matches. I can still remember my friend Jose killing me in that lava room trap and the laughs had. I wasnt a big twitch gamer but my brother and I did a little bit of Q3A DM but it wasn't my thing; I prefer a story and casual game play.
I remember buying Quake 4 but I don't remember playing it. Tells you a lot right there.