I can think of a good deal of quirks of mine off the top of my head.
-When I'm stressed, I rub my eyebrows. Not my forehead, like most people when trying to soothe a headache. No one seems to notice it though, but I try not to do it in public.
-I write with my left hand, but I seem to be a little ambidextrous. I use a mouse with my right hand, I do sports with my right hand, but I walk first with my left foot.
-I have...dimples. >.> -hides face- You may not see them!
-I'll scratch my head even when it isn't itchy. It feels good.
- I have to wash my hair everyday, or else it will look like I haven't showered in a week. It's bad genes.
-Even though I'm sensitive to bad grammar and spelling online, I can't talk that way. I get all anxious and start messing up, and it's hard to think before I speak in a conversation. Sometimes I say things without even knowing I said them the way I said them. "I can't believe that the books costed that much". I totally thought I said 'cost', but whatevs.
-If I'm worried, restless, or can't sleep, my leg will start moving. Not like a twitch, but it moves back and forth. Usually subconciously.
-I can't swear in real life. Not purposely, anyways. If I ever do, it's because I say a word wrong. "Shammy" somehow turned into the s-word. I felt so bad after that. And I was talking to a cat. ;.;