[Bad]

I use/used Bad a lot when I play arcade games or old NES/SNES games with the limitation of 3 letters for your initials. Then I use/used Bad, because if I get by some fluke highscore on any game it is pretty sarcastic. And sarcasm is fun. Also it fits most of the time since my results is pretty bad.
My real nickname is simply Yo or Yo-kun. Other names I use is Yopparau (Japanese for ~Let's get drunk(also Yo from just Yo-kun)) or Demo (also kind of sarcastic name.
Plus Bad is a good name for bad puns and jokes.

Side note: So it hasn't anything with me wanting to be bad. Quite the opposite in fact. I am actually cute as hell... that sounded wrong...

Edit: Thumbs for the thread!