There’s one very obsessive habit I have.
I obsessively check and recheck things. I’m sort of “OCD” about it.
When I lock a door, I check at least 2 times that it’s locked. Sometimes, I’ll walk away after checking and then come back to check again. I didn’t know I did this until a friend said something along these lines to me one day, “how many times are you going to check the door? It can’t be any more locked that the last time you checked”.