When I first played Halo I was young enough that my two favorite games at the time, Metroid Prime, and Star Wars Bounty Hunter, dictated everything for me. So my name for halo was a combination of the titles, Prime Hunter. When I finally started playing online Prime Hunter was already taken, but at the time I had played Halo 3 which made you use a 3 character ID as well, I chose H01, H for hunter, 01 because its a prime number. And it has been long enough that it has sentimental value. I considered starting to use Hurricane Isaac, after Hurricane Isaac happened, but I would feel weird without being Prime_Hunter_H01.