Definitely not OCD here, just enjoy driving cars. Used to go mad with cleaning when I was much younger(won a couple of trophy's at show and shine competitions), not now though. I'd rather see a car driven properly rather than parked up being polished. Never get attached to cars either now, just sell when i get bored, which is quite often.
But each to their own, people enjoy cars for different reasons and get their kicks in different ways. I enjoy seeing all sorts of cars and take an interest in most of them, but I know I'll never be OCD about them.