At the risk of appearing a nutter..
I dislike the L and R on socks too - I put my left sock on first and if I pick up the one with R on it I feel it's a bad thing. I know it's only probability but if I get the L one it gives me a little lift

I have to eat my vegetables first and in order of colour - so green veg is always first, followed by carrots etc. Potatoes are always last. So it's green veg, other veg, main bit, potato. Bit embarrassing eating out with other people, that.
I have to talk to myself for a few minutes before I go to sleep, I find it relaxes me. If I don't it takes me longer to nod off.
Not a habit, more of a phobia.. I have a problem with coathangers - don't like the plasticky ones because of the noise and I imagine them snapping. And as for the wire ones, I don't like to touch them as they feel funny <shudders> I'm ok with wooden ones.
<turns around three times and leaves the room>