Like someone else previously stated, I only eat one kind of food at a time. I won't eat something and not finish it, and go on to something else and switch back and forth.
I walk in circles constantly. This could possibly be because of OCD. Adding on to this, I always walk around the room when I drink something. I never sit down when I'm drinking unless I'm in school where I could get in everyone's way by walking around.
I have this odd way of holding my pencil. People always ask me how I hold my pencil the way I do. I'd like to ask the same question to them. I have no idea how to hold a pencil the "right" way. I did at one point, but it put more stress on my hands and made my handwriting even worse than it is normally.
I talk to myself constantly, and not the way most people will occasionally talk to themselves. I will go in my room, close the door, and talk to myself about things for hours. I usually talk about the same things over and over.
Before I go to bed, I always look around the room to see if there are any ghosts. I'm extremely paranoid of the paranormal, and I've seen (or heard, rather) strange things in my room at night.
I wash my hands about every five seconds. I have OCD and am extremely paranoid of poison and germs. If I see even the slightest stain, I freak out and think it's poison. An example of this is when I stopped reading a book because I saw a stain on page 11 (how I still remember the page number, I have no idea) and closed the book immediately because I was afraid it might be poison. I got lunch detention the next day for not reading the chapter (I didn't want to explain why because the teacher might not have believed me, and I couldn't prove it because we weren't supposed to bring the books back to school). This is something that drives my mom crazy. I believe a starting factor in it was the ant traps my mom put around the house a few years ago. I was definately afraid of them.
My personality changes several times a day. It seems like I'm not one person, but several. I have many personalities, and my personality changes occasionally. This really annoys me. It would be nice to just have one personality, instead of constantly changing from one personality to another, and feeling ashamed of the way I acted earlier when I had a different personality.
There may be others that I forgot about.