I cannot carry a wallet in my back pocket, always the front, if i carry one at all
I don't put nearly any liquid condiments on food (e.g ketchup on hamburger, mustard on hotdog) Vegetables like pickles and onions are fine though
if changing any bulbs that are pairs, I have to change both at the same time, as I can't stand one bulb being brighter than the other (A real pet peeve when driving at night)
I almost never carry cash, and will often times go as far as stop at the bank to deposit a 20 dollar bill that someone gave to me.
Both socks must match.
I can eat cheese, as long as it isn't cheddar
I check gum and candy for sorbitol. Not because I'm allergic to anything, but I think candy shouldn't make you nearly shit yourself if you decide to eat the whole bag.
I refuse to drink anything that has vegetable oil in it. (Mountain Dew, Sunkist...im sure there's more)
The corner of the comforter on my bed must be turned down when the bed's made.
Ya that's all I can think of ATM
EDIT: Another one: Labels and alignment. A crooked label bothers the hell out of me...I have to straighten it.