People who disagree with you won't annoy you today: in fact, you will have an absolute blast debating ideas and learning how other people see things. Meeting someone new: who has a lot to say about very controversial matters: will tap into a seldom-used area of your brain and stimulate you to think in new ways. You may even (gasp! ) change your mind about a thing or two. Revising your opinions and beliefs is necessary from time to time.