When I walk into my kitchen I never step on the door sill. While there is nothing bad there, it always feels like there are upside down spikes or something that would go thru the foot.
I also have some obsessive compulsive behavior when it comes to cutting my nails, I cut them several times a week and keep them very very short. If I'm somehow away and unable to cut my nails for 3-4 days I start to get very annoyed at my "long" nails.
Some of our carpet grippers have rather long "teeth" so I do often impale my feet when standing on the door things. Not enough to draw blood, but enough to make me think of sweary words.
I also tend to be the same with my nails, I
hate having even marginally long nails. Anything over 1mm annoys me. I'm probably lucky I don't have real problems with ingrowing nails as a result.
Back when I used to have a digital watch (they were actually popular once, around the time they first appeared in the 1850s) I had a bit of an "almost OCD" where I would have to watch the hour change. That went on for a while until I decided that no good was coming of it, so I managed to dig myself out of it. I have plenty of other obsessivy little things to keep me occupied anyway.