I would like to write about my pet peeve =(

So, today our teacher Ms, Kate gave to us, interesting topic for our discussion "write about your pet peeve(the things that annoys you the most)", funny topic for discussion, isn`t? Honestly, I never thought about this question, but I will try to respond positively to this` negative question.
Well,  By nature I am a nervous person, and  many things annoy me =) I'll start with the habits, I hate when someone knocks during the lesson pen, it makes it difficult to concentrate, I don`t like when someone chomps when eating,