Ragadolf, my longest running PC in a D&D style game (We were using Hero System rules) He was an old, cranky, insane and memory-challenged wizard who tended to speak of things that the other PC's had never heard of. (Particularly bad Movie and TV references, Based on Zifnab of the Seventh Gate Cycle Series) The name was a combination of Radagast and Gandolf. He became my favorite PC, and Now I use the name for all of my gaming-related PC/online stuff. I have never found it used by anyone else. :)
The avatar was rather how I envisioned him, so I chose it.
Something about me- I am living proof that Old Nerds/Geeks never die, we just keep hanging around playing games, pretending that we're still 20. ;P