You chat online, or play XBox or whatever…why do they choose the names they use? I think about this all the time. Don't know why I've never asked.
The reason I chose Castle_Bravo is long and silly. Castle is the surname of a comicbook character I've read since I was a kid. But a certain show kind of ruined it for me. I was bumming around Wikipedia one day and read about Castle Bravo, the largest nuclear device detonated within the U.S. it was a hell of a read.