I am very particular with the way I brush my teeth, it takes me around 8 minutes in the mornings to do it my way, I feel unclean if I don't and will not be able to stop running my tongue over my teeth all day.
I can only empty the dishwasher if I have the same thing in each hand, eg: I will always take two bowls or two glasses out at the same time.
I am looking forward to reading everyone's pedantic quirks! I'll probably think of more to post later.
I do not have anything actually close to real OCD behavior but I am quite particular about keeping the kitchen clean. I get annoyed if there are used dirty utensils on the counter, if the sink is full of cold water and dishes just in there, if there is pans all over the place and crumbs left on the counter. It is nothing compulsive but I get annoyed enough to have to clean it all because I like to see a clean kitchen.
I have like.. symmetry issues? idk but like if I step on a crack in the sidewalk with my left foot I have to step on one with my right foot or I'll feel off-balance, this applies to a lot of things like if I'm holding something in one hand I have to be holding something in the other as well or it won't be equal.
I'm also constantly flexing my hands for some reason.
If there's anything I'm OCD about, it's sleep. If I don't get exactly 8 hours of sleep (no more, no less) I freak out. If I know exactly what time I plan to wake up the next morning, I calculate what time I need to go to bed to achieve that. If I stay up past that time I get horrible anxiety 0.0
Also, shoes. I hate having shoes laying around the house, or even if they are just laying on their side. I have to line them up by the door neatly.
I also hate writing with pens. It's too smooth and I feel like they glide across the paper too easily so I don't have as much control.