I'll get slightly defensive now.
My avatar is a character. She's a horny, trigger-happy lesbian with an almost constant malicious grin glued to her face. Some of interests include drinking, probing unsuspecting humans, and watching cartoons in her underpants.
So she's pretty much just the opposite of me.
I've never come up with something awesome to call human users.
I feel so uncreative now. But then again, I don't really roleplay my account like it was it's own character. Nope, it's pretty much just always me talking.
Unless I say something like "I set my bazzoka to love and blast you with hugs and kisses".