Old-school HL2DM, then GMod mapper. Back when HL2 was released, other than being excited to play the game, I was almost more excited for the SDK. Once it released, my buddy and me spend countless nights building all sorts of weird and broken maps to see how far we could push the new physics systems. We also played GMod way back when it was only just a mod, and had a ton of fun. Years later, I rediscovered my love of mapping, and released a few new maps, and even a gamemode which was almost entirely map and entity IO based (since I'm not a coder). As a career, I design and teach competitive marching shows, and started a company last year where we're developing wearable, fully programmable, dynamic lights for integration into large scale performances with unlimited numbers of performers and equipment, all lit up! I also stream games on Twitch sometimes.