Since 1996, I've been actively designing levels for first person shooters. While it's both a hobby and a job, it's immensely satisfying in any environment and, in my opinion, is rivaled by no other process in game design.

Some of the games I have designed levels for (or plan to in the near future):

id Software's Quake 3: Arena
id Software's Quake 2
id Software's Quake
Ritual's Heavy Metal: FAKK2
Valve's Half-Life

Click on a game on the center menu for screenshots and download links of the maps that I've created for that game.