I remember when Ladezkik hosted building projects frequently, and when Gentoo hosted his well-matured mini-empires. He was always experimenting with some newfangled map in order to find the best construction experience.
I remember when there was a person with MASTER somewhere in his player name who hosted a fortwars server. The map would always be the Garry's Mod map that was enclosed and had a little pond to one side. We were very good friends, and that server had a white rapid-fire machinegun that I can't find (but that is still in my cache) called the F2000. That was my favourite machinegun.
I remember Pecon's Boss Battles in it's early days back in Bedroom, when Dark Samus still had the floating animation and when the projectiles were still roughly-shaped. Good times.