Although I still think Chiyo is the best Blame! is great although I never finished reading the series.
Mine is the encircled tree of life (also known as the sign for peace), which funnily enough happens to most often be represented by the encircled tree of death.
<=== I googled for a baboon. The name comes from college. There was a guy who was a jungle MC called MC Bass Monkey and he called me Da Rude Baboon one day and its been used ever since when i need to sign up for things on the net.
Mine relates (vaguely) to my love of playing Unreal Tournament when I first got in to PC's some years ago. Can't remember where I found it originally, but it's become very familiar and comforting in a strange sort of way