I use so much baby powder after a shower that I leave a pile on the bathroom floor and footprints into my bedroom, every day.
I eat Doritos with a spoon. Always.
Unless at a restaurant, where I have to make do with a glass and a straw, I will only drink Diet Coke out of a can. I'd rather drink a can of it at room temperature than pour it into a cup with ice.
What are your little idiosyncrasies?