Having children. Every aspect of it, from pregnancy, birth (in any way or shape), the sleepless nights, the constantly crying babies, the nappy change and toilet-training neverending periods, the constant sickness and snotty noses and fingers, the tantrums, the worrying, the screams, the constang neediness, the grumpy and dramatic teenagers, the family dramas... I never had any desire to engage in this myself, and even after many years working as a midwife, I can't fathom why anyone would want to raise a human, let alone more than one.
I know, I know, I'm posting this on MumsNet 😁
Also, "going to the pub". I can do it occasionally, but people who go almost every day? I find them awful places to be in. Noisy, smelly, cramped, full of people behaving like yobs. Give me a lovely cafe any time.
The need to live "with someone", and people who feel "lonely" when they are by themselves. I love my own company, and find other people in my space annoying.
People who need to have noise in the background at all times. Music, the radio, TV... I love silence. I love going back to my quiet house.