My funny LAN party story with regard to these games:
I actually got my buddies into deathmatch/multiplayer first-person shooters back in college via UT2000. They all got new rigs for the first time, so I got them all to get the best FPS available, as opposed to having them backtrack to the likes of Doom and Doom 2. So we all went to the store, grabbed a copy of UT, and enjoyed it.
One of my friends sort of resented the fact that I successfully got the gang into the FPS genre and wanted to outdo me. Real competitive asshole that always felt the need to lead and start the bandwagon. So he went to the store weeks later and grabbed Quake Arena and managed to get us copies. Of course, I was excited to play the game, and everyone loved it, but not a single match would go down where he wouldn't shout out to the entire group how the game was so much better than the "shit [my name] recommended" (i.e., UT).
It eventually got to me, and I made it a mission to make his life miserable by deliberately targeting him exclusively during each deathmatch. He was still new to the genre, so he wasn't as good with leading the targets, rocket jumping, and overall aiming. Naturally, he got sick of it and we almost came to blows.
12 years later and he's never played another FPS since those sessions. I know because, to this day, he keeps an online blog of all the games he currently plays and has beaten.