I hate it when they share too much. A little superficial stuff is OK. "How was your vacation?" "Oh great, we had a good time in California." But don't spend too much time on it. I pay therapists so that we can talk about me, specifically my problems. And that's very different than the way I am with friends. I don't mind at all listening to friends complain or talk about their own stuff. In fact I enjoy listening. But in therapy I get to be selfish.