There’s loads of thing that don’t bother me, but seem to really wind other people up.
People being a bit late, really doesn’t bother me if someone is 5 or 10 minutes late for something social, I know some people feel it is the height of rudeness and take it very personally. It only bothers me if they are often very late or when time keeping is essential e.g. for an event.
People merging into lanes, I don’t understand why people won’t let other cars in when lanes merge, they are using the lanes as they are intended!
Wedding anniversaries, I celebrate my own, but my family get extremely offended if I don’t celebrate theirs as well every year with a card and present, I really don’t get it.
People vaping or smoking in public, as long as the smoke isn’t blowing all over me I couldn’t care less.
People putting their rubbish/bagged dog poo in my bin that’s out to be emptied. I know mumsnetters hate it, but it doesn’t bother me at all.
Noise from neighbours (unless excessive) I don’t expect my neighbours to tell me when they are having work done to their house or when they are going to do DIY or have a party, I don’t mind dogs barking or kids screaming/crying unless it goes on for hours.
Cats in my garden, couldn’t care less.