I finally wised up and kept the answer to this question on a document so can do a quick paste with a little editing for the dates...
My favorite comic book in the 60's was Enemy Ace, along with Sergeant Rock and The Haunted Tank, etc... In 1998, I started flying a WW1 air combat sim called Red Baron II, then later Red Baron 3D, on-line and most of the other sim-pilots took historical WW1 pilot names, or the usual crop of the nonsensensical or humorus ( I was partial to Lt Pat McGroyne, my "Allied" persona) but there were several of us who went with fictional ones. Hans Von Hammer, "The Hammer Of Hell" was my first pick as a German pilot-name, and I've carried it to other forums as well..
Even the CAF has hung "Hammer" on me as a call-sign (for a different reason though. My first name is Mike and the CO at the time was a fan of Mike Hammer detective stories and hung that on me), so it got put on my name patch as well. I didn't let on to the fact that I liked it, since one of the "Call-sign Rules" states, "If you like it, you can't have it"...
My avatar changes periodically, just to keep folks guessing... Currently, it's a picture of me back about a hunnert' years ago, when I was a young Army Staff Sergeant and the Section Chief on an M109A3 SP Howitzer... I prefer pics of myself as avatars, mainly because I think it helps folks communicate better in forums if they get a face and a name... Plus, I just love a good "Hero Shot"...