What is the odd little trait that you have?

For me, I've recently been making sure I always look exactly like I did the day before. It began intentionally, as a joke, but I think it's growing to just being something that happens. What I do is have enough jeans to wear every day, a sweater that stays clean, one pair of shoes to wear, and any random shirt. Every day I'm changed and cleaned, but I wear another identical pair of jeans and shoes, and throw on a shirt and my sweater. The sweater's purpose is to cover up the shirt. Also, my hair is trimmed short, so it never changes. All of this adds up to me constantly looking exactly the same every day. Somehow I find it liberating...dunno why...Oh, also, the excuse I give people when it's brought up in conversation:

"Well, everyone always sees me looking exactly the same. So then they come to rely on this image to identify me. Well, whenever I snap and decide to kill someone, all I will have to do is change my clothes, and they'll not be able to recognize me, and I'll get away scot-free!"

Oh, and for something that I didn't purposely start. When just doing something, I unintentionally just let my mouth drop open. I'll be sitting there, playing a game, watching a movie, or working on the computer, and I catch my jaw to be dropped slightly.

Alright, now for something odd you do.

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IHN - American for "Thread Killer"