I came up with mine sort of on the spot. When I first discovered IMCDb, I would just come on as an observer and didn't really join. However, one night I finally decided to join when I kept on seeing numerous mistakes/errors being made while ID'ing vehicles. But when it came time for my username, I hadn't really thought of one before. So since Ford is my favorite automaker out there (despite their current flaws/stupidity), it came as natural for me. I figured it would be self-explanatory.