I feel the urge to correct people’s spelling, especially when they use incorrect homophones.
The volume on my radio has to be set to particular numbers: 1, 3, 5, 7, 8, 10, 13, 15, 17, 18, 20, etc.
I take odd (the first, third, etc) steps using my left foot, and even steps with my right foot.
I’m admittedly a perfectionist, and will often do things over and over again if I’m not happy with the outcome.
But I do not have OCD.