Well, since you asked...
My username is a nickname that I am called at work.
It's a combo of my real name, Tom, and the name my first supervisor called me. I was just a kid of 22 years, working mostly with engineers that were 50+. One day, we needed to move a dozen or so 750 MB hard drives from one end of the building to another. Back then, a hard drive was the size of medium sized refrigerator on its side, and weighed hundreds of pounds. None of the older guys wanted to do it, so my supervisor said, "Get the young buck to do it.", and the nickname stuck.
Half of the people in my building know me as Tom, and the other half Bucky. So a Korean coworker started calling me Buckytom, then that name stuck.
And I need to change my avatar. Ithe current one is a pumpkin carved in the likeness of myself and my wife. Sort of.