The very first username I RPed under, at age 9, was Superman~fan. That lasted for two years, and then I became IAmSuperman for an additional two.

... I don't even really enjoy Superman as a character in most incarnations.

Since then, though, it is not an exaggeration to say I have had well over 50 usernames in total across dozens of RP forums. Including the four most of you would know me by, and the fifth Nate would be familiar with.