DH has 'quirks', but they are actually characteristics of his OCD. I've learned to live with them. Even though some of them are hugely irritating.In some cases, like the last one mentioned, they affect our lives to a worrying extent.
Numbers: he actually lives his life by numbers, but this is only obvious to me when its causing a problem because he mostly keeps it in his head. For instance. If the number of the moment is 3, he has to pick the third item off the shelf, or climb steps 3 at a time and so on. He rubs the remote control 3 times before using it. etc.
Contamination: he is obsessive about cleaning the toilets. And bleach. I'm sick of all the bleach. I've asked him to tone it down, because its not good on any level, and he has, a bit, and he's stopped putting loads of those goddawful coloured blocks in the cistern.
Also, he has to start each kettle boil with fresh water. And it has to have 'just' boiled, or he will tip it away and start again. Which does my nut in.
Textures/colours: he can't have 'dark' next to his skin, unless its washed a gazillion times first. He has been late to an interview before, because he forgot to bring long johns with him to the hotel, so had to make a detour to the supermarket first to find some light coloured joggers to wear underneath the suit trousers. This was still really hard for him to do, because the joggers hadn't been washed first. But it was preferable to dark. (He was offered the job, despite being late for the interview)
There are others, lots, but I've forgotten most. I think we've been together so long they've become the norm.
I don't think I have any quirks, but I may well be wrong.