--I have to have anything numerical on an even-numbered setting. Luckily...many things I own aren't numerical. So...radio can't be set at 23, it has to be 22 or 24.
--I can't answer the phone in the middle of the ring. I have to wait for the pause in between rings.
--I can't eat pasta out of a dish -- it must be in a bowl...
--The bowties on my car HAVE to be clean, even if the rest of the car is not...
--nobody leans, affecionately kicks, or taps my car -- I'll flip out something fierce.
--wallet in right/back pocket, phone in right/front, and keys in left/front or cliped to belt. If any of these things deviate, I go absolutely insane all day long. Ask me about the day I misplaced my phone...

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That's really about it...