A lot of things in this thread I wouldn't call OCD, I'd call common sense.
What upsets my wife the most isn't my OCD, but that I'm selective as to what I'm OCD about.
I straighten the shelves in the grocery store.
There's a new horse at the barn. She gets put in a stall every night. She's been there three days now, and this is the tag on her stall. I fixed it. I don't know the owner, haven't met them yet. But it bugged me. That's gold poster board from Hobby Lobby and vinyl cut on the Cricut. I made another one for the horse in the stall next to her. That one didn't have a plate. I don't know that owner either, but I've said "hi" to her a couple times.