I think I'm slightly OCD (I'm always slightly something) because when I was younger, the "Step on a crack you break your mama's back" thing kind of stuck to me. I spent some years of my life subconsciously not stepping on a crack, although when I did, I didn't freak, but it felt weird. I'd even develop a stepping pattern to not step on it. Now I've overcome that. Sometimes it comes back, though, like the other day.
there were just so many damn cracks.
Also, skittles are my worse nightmare because if I have more of one flavor than the other, I wouldn't eat all of them. I also rarely end on random numbers. If I have five skittles left in my hand, more than likely (if I can help it) I'll have one of each flavor. That I haven't overcome. That's why I avoid them and stick to starburst so I don't have to worry about that.
And sometimes when I'm eating, I always (always) analyze which pieces of whatever I'm eating is bigger, or has the most toppings, or looks the tastiest, and whatever one that is, I eat it last. That's something I haven't overcome. It doesn't bother me that much though.
But I've overcome a lot of my OCD issues myself because I tried to stop caring. At first it was weird, but after a while, I got over it.