Geoffrey42 is pretty straightforward. I'm proud of my uncommonly spelled middle name (at least in the States), and whenever Geoffrey is already taken, I add a 42. And when that's not available, I add something else.
Now, my dear, dear Flossy the avatar. Whether or not people remember it, Space Station Silicon Valley was a game that came out for the N64 where you were a robot, reduced to a microchip, whose only means of survival was inhabiting the robotic bodies of the other mechanical creatures on board (Rocket-firing wheeled dogs, floating sheep, remote control style rats, etc, etc). It was a great game, but also one I followed from early development all the way to release. Polished, it was not. But the game itself was great.
Flossy, as it turns out, is a piece of art produced by the makers of the game, with one of the standard in-game sheep, all dolled up. Ever since I found her, she's been my avatar far and wide.