My Pdoc isn't a completely blank slate, but he only reveals stuff to me that's either fairly innocuous, or that I will benefit from in some way, like stuff I can relate to. It's sort of nicely in between being a completely blank slate, and being so over sharing that the therapeutic relationship begins to feel threatened. I've had both types of Ts/Pdocs before and the extremes of either end don't suit me. I prefer a more balanced approach.