A goblin player character.
A friend from EVE Online requested a picture of two pirates done in a particular cyberpunk style; in exchange, I received a Myrmidon-class battlecruiser. This was my introduction to the gaming world's acceptance of exchanging art for ingame assets.
I received a commission to do the mascot for the Edinbugh University's GEAS Sociey ConPulsion convention back in 2008 (or thereabouts, I can't actually remember what year that was). The original was a black-and-white inked design; this coloured version happened later.