I feel you on the three ice cubes thing. It's the perfect amount. Gets your drink cold without taking up too much room.
I can't really compete with your OCD habits but I'm pretty OC myself. My habits are pretty standard:
-Things must be in neat piles on my desk, right angles are a plus.
-I wash my hands 10+ times a day cause, let's face it, other people are dirty.
....pretty standard OC habits
