Mine was very strange. Ever since I was a little kid I liked tigers. At the zoo, I wanted to see tigers, and I always got stuffed animals that were tigers.
That became the first part of my name. The second was my fear of huge storms as a kid. I decided to use that to my advantage.
Tigerstorm was made but I felt like I missing something. So I added a 6 at the end. My favorite number.
And that's stuck for every game I play :)