I'm with you. My pens and pencils were always sorted by colour, and it never worked, which was infuriating. I was always trying to find a major breakthrough and discover the ultimate colour order to end all my problems.

I can't listen to music in an odd number volume, which is annoying, because it's either too loud or too quiet. I have to eat all itens in my plate in equal share, including the drink. And now I went as far as labeling the names of all the objects in my classroom so they always are in their correct places.