I've always used some variation of "Jester" or "Fool" in my handle, so I chose a great picture of a "Pimp Jester" on Deviant Art. The artist is just amazing and has multiple pictures in the "Pimp Jester" line, and this is my favorite one. I use it everywhere that I can customize my own avatar.
Also the colors black, red, and white are my favorite color combination on Earth. So it was pretty much destiny that I found and use this.
...I don't see why anyone would possibly use an Avatar that they didn't like when they can freely change it...quite an odd question...