I know quite a bit about T. It makes him human to me. He shares personal stories when it's relevant to my therapy. It's not as if we are talking about him and his issues. It's how he connects with me. It's real. I don't think I would do well with someone who was very formal and not ever making it personal.
I also know he has anxiety and how he used to scan his mother's face to see what mood she was in. But I don't know about specific psychological or any physical issues. I know enough to make me comfortable but not too much!