#1 Listening skills
Or the lack thereof. Nothing is more irritating than someone who doesn’t even make the effort to listen to what the other person is saying. Instead, these people are more intent on formulating their own words and cutting the speaker off mid-flow.
#2 Deep pockets and short arms
Generosity is a wonderful quality, but its opposite is notably disliked. If you’re always keen to avoid paying your way, then chances are that people have noticed this trait of yours