I've been hooked on Counter-Strike (and its predecessors CSS/CSGO) since around 2000. I started playing around in 3D apps around that time and got into making levels for CS 1.6 around 2004 or so.
Eventually I built Wall Worm... which is my answer to the painful process of getting custom assets into Source. For most props, you can send your models and textures into Source from 3ds Max with the click of a button or two. You can also now send levels from Max to Source. I've been working on it since around Nov 2010.
I joined Snarkpit in 2006 but it took me until today (Dec 2012) to write a profile here

I guess I was waiting for the Mayan apocolypse to see if it was worth my effort.