If I am sharing a space with someone be it in a desk clump or standing beside someone, it will anger me even if they have a few inches of more space than me. Very petty of me. I don't know if that makes me overly territorial.
Or when you are sitting in class or lecture hall and feel someone bump or tap your chair from behind, I HATE THAT. Usually I turn around and give a stern look the first time but if it happens again I'll tell them hey can you please stop tapping my chair. If you do it again I will literally challenge you to a trial by combat so you answer for your crimes.
Also idk about you guys but sometimes if I experience a terrible event or series of events in a certain shirt I will then try to avoid wearing that shirt from then on, that's probably the most paranoid, the rest are pet peeves lol.
When I was 9 I had this polo shirt which had a grey base and black and red stripes. I loved that shirt. But whenever I wore it something bad happened and I would get beat up by parents for messing something.
Probably more, will post as I remember.