My main T has told me a great deal about his own struggles (bits and pieces that add up over 20 yrs!!) Some on his own analysis and a phobia he still has to manage but has in check.

CBT T doesn't admit to many personal struggles, just wanting to understand his own parents. He shares some personal things if they are relevant to what I'm struggling with. Not sure if he really is so well adjusted or he just won't share stuff like that.

Personally, I like self disclosure from a T. It helps me.