My screen name has nothing to do with my personality, just a reference to a Clunker Crit where a girl had a, uh, wardrobe malfunction. She used some Surly bike bumper stickers that were being handed out to preserve her modesty. XH couldn't stop talking about it for weeks ("Wish I had a Surly Girl!", as though he'd never seen boobs in his life, and I wore a chastity bra 24/7). I had to register for something around that time, and after my 5th attempt at some variation on my name/location/favorite TV show just to find it was taken and I'd have to tack on the square root of pi after it, I put in "surlygirl". Shockingly, people weren't flocking to claim a username that screamed "zOMG, she's on the rag, run away!" so it was mine for the taking. I signed up for the Dave Ramsey website with it, never thinking that I'd actually participate in the forums or else I'd have chosen "fartsrainbows" or something. I eventually came to terms with my pseudo-surliness, so here we are.
As for my avatar, I just googled "woman mustache" and picked the awesomest one.