Mine's not that interesting, just my real name backwards. Plus "T," which is the last letter of my last name, as thus my last initial if I switched around both names.
I'm not really worried about internet privacy (I hope I won't say anything stupid--and besides the government already knows everything I say), so I'm okay with people knowing my name. I could've done something clever, like based on TV, sports, history, politics, music, or something like that, but what I'm most interested in changes from one hour to the next, so something specific doesn't really cover it. And I don't really have nicknames, so that doesn't work either. This is a Diplomacy site, so my rap name would be off-topic, I think.