I do the same thing with the volume on the surround sound and also in the car, it has to be on an even number.

We have coloured mugs and they have to be stacked in the cupboard with matching colours on top of eachother. All my cutlery has to be stacked properly in the drawer, we have 3 different cutlery sets and the forks from each set have to be stacked separately on top of eachother, all the knives have to be facing the right way and the different spoons all have to be stacked in matching sets.

Scott has the thing about notes all facing the right way (all queens heads facing the same way), he also lines up the dining table so the gap inbetween the two chairs lines up with the Sony label on the TV on the wall in the dining room.