I'm just a Half-Life mapper. Despite the age of the old HL engine, I still enjoy trying to push the limits when creating maps for it.
On one of the rare occasions that I am actually able to play NS online, I connected to a server running siege maps.... after which, I decided to make one of my own, which hopefully won't be too crappy when completed. At the very least, I'll have actually included lighting in a siege map (yeah, I know, been done before, but a lot of them still don't have this..)