I sat in a room with one for approx 40 hours. It was obvious I didn't know her very well, even though she disclosed more to me than any other client. Her disclosures were paltry little things that she rationed out. After we had a rupture she behaved like a different person.

Most of the ones I have seen were heavily filtered automatons. Real people express needs, opinions, judgements. It's hard to know someone who methodically suppresses these things for months or years.

The justification is that therapy is for the client, so the therapist should keep their needs quiet. I consider that a red herring. The issue is whether the client knows to whom to they are talking, and if they do not, is that the basis for a healthy relationship.