Wow, I never thought of it as being OCD.
I am definitely one that doesn't like any stubble on my dome, because when I go to take off a shirt or remove my hat, I hate the feeling of my shirt getting caught on my head or the sandpaper feeling when putting on or taking off my hat. AND, that's putting it mildly.
My desired shaved result is as slick as it can get. If growing a shadow or letting it go for a week or two, then it doesn't really bother me. It's the stubble jot on the day of or the next day that's frustrating.
Shaving it as low as it can go!!!!