What's the deal with your nickname? How did you get it? If your nickname is self-explanatory, then tell everyone when you first started using the internet, and what was the first thing that made you say "wow, this isn't just a place for freaks after all?" Was it a website? Was it an email from a long-lost friend? Go on, spill it.
I picked up my nickname a while back. I had a boss with the nasty habit of "shooting the messenger" every time someone came to him with news he didn't like. After a while, my co-workers and I had a running joke about having to climb over the pile of dead messengers stacked up outside his office door.