I had a dog once - a malamute. When it came time to sign up for something I couldn't think of a decent username, so I looked out the window for inspiration. Now "malamute" isn't a particularly great name but she had a fresh bone at the time. I was inspired by the rather savage way she was eating it, leading to the name that I use now.
Which in hindsight is a bit cliche and boring, but what thirteen-year-old ever picks a decent username.
How did I get Crow in my XBL username? No clue. Name generator maybe?
Brandon Lee films?
The reasoning behind mine should be fairly obvious.
Petty theft? It's what you Khajiit Lords do, right?