Arrogance / way too much confidence. Basically I wouldn't see a know-it-all therapist. We all make mistakes and I also don't believe any therapist can "change" a client, it's a lot of work on both sides and comes with no guarantees, so I wouldn't see a therapist who makes empty promises of healing and well-being. Instilling hope is good, saying progress takes time and that it will probably get better if we take it one step at a time and don't give up is fine, but I wouldn't trust a therapist who says s/he can make me feel better or that my problems will definitely be solved.I wouldn't see a therapist who neglects personal and professional development. Also, I avoid more, smaller pet peeves, such as this one therapist my therapist saw and told me about, who used an alarm clock to announce the ending of sessions - I would find that cold and feel nervous and unwelcome. I would also feel very uncomfortable with a therapist who would want to use the more courteous "you" in our language - just something I feel would put a distance between us. There are many things I don't want in a therapist.