A sound that bothers me is the one some adults make when drinking some liquid, whether it's juices or soups. I absolutely do not tolerate chewing food with their mouths open, making loud and annoying sounds.
I understand that in some cultures this means health or that the food was very good, but in my culture it is quite disgusting and I do not tolerate it; To the point that I can stop eating when I hear those sounds.
I'm glad I don't hear it very often.