I have several names, varying for controller settings:
EpixAura: Really, I use this for everything. It's so hard to find a name in MMOs without using a number, but this worked, and I loved it, so it stayed.
Cykos: From a fanfic on a Sonic forum, would you believe it. I'm not a big fan of the forum or of fanfiction, but my brother is, and the story was so amazing that I had to pay tribute to it in some way.
Flaco: As a Falco main, I changed around some control settings to make certain techniques easier, and HAVE YOU EVER TRIED TO TYPE FALCO?! It ALWAYS ends up being Flaco. Therefore, I made it my name.