I do the peg thing too - you are not alone there! It drives me mad to see other people's washing sometimes! The only other one i can think of is that I can't stand things being squint - like pictures on the wall or cigarrette lighters in cars - they have to be straight.

DH has a stange one about volume controls - they have to be at an even number or if the volume goes up to a high number (our stereo goes up to 90), it has to go up in increments of 5.

What strange creatures we are