Hi UV... researchers have found that people who suffer from abuse and complex PTSD do much better with Ts that self-disclose to a certain point. This is because safety is of the utmost importance to complex PTSD survivors and they cannot feel safe if they know nothing about the T they need to confide in and revisit some scary and painful stuff with. The blank-slate approach does not work well with this patient population.
I know a lot about my T, some was self-disclosure, some from my own observations. He also treats my son. And so, knowing what I do helped me to feel safe and to trust him. I needed to establish those two things before I could really start to do the hard therapy work with him.
Perhaps your T knows this and that's why he made himself more transparent to you. He sounds like a really good T.
TN