It annoys me when numbers aren't either even, a 3, a 7, or multiples of five. What Caite-Chan said about the TV volume would be the kind of thing that an odd number would bother me in. If I was going to lower the volume, and it hit 53%, I would have to lower it to 50%, or at least 52%, so it would be even.

I also have a thing with the chair I sit in at my kitchen table when I'm eating. I always have to sit in the same chair.

Oh, and I always take showers twice a day, even if I know I'm going to get dirty an hour later.