I have to strip and clean my push bikes after every ride.
Even if it’s been a dry run, everything gets removed, cleaned, re-greased and torqued up correctly.
I’m the same with my motorbike and although I don’t strip that down; that’s only really due to a lack of skill and tools. Even just an hours ride results in a 3 to 4 hour cleaning session.
Having said that, I find faffing around with my bikes to be very relaxing.
I believe that I also have a funny character trait when eating food which I only became aware of when colleagues noticed on a works meal out.
I always eat different food types separately and won’t put more than one food type on my fork. So with a roast dinner for example, I wouldn’t eat some carrot, then eat a potato and then some meat and then have a bit more carrot. I have to fully eat each food type before moving onto the next.
Don’t know if that’s OCD though, more just a strange behaviour.
Edit – I have thing for tools being in the correct place as well. I think that’s quite common though.