T1 and T2 have given me self disclosures but only as they pertain to that moment and what we are discussing (parenting etc..). I have outright asked my T's questions about themselves like: What lead you to becoming a T?
I think knowing a little about them as it pertains to the discussion can make them seem more human.

I think knowing more than less can be comforting at least for me.
I wonder if there's a 'type of client' that would do better not knowing anything? Curious to see what others post.