My previous therapist wouldn't disclose much about herself- including her travel destinations. Not that I particularly cared where she was going on vacation...but her blank slate method ended up not working for me for other reasons. It created a lot of relational anxiety on my end and made me MORE "needy" of her validation and what felt like crumbs of caring. In hindsight, she and I weren't a great fit. After 3.5 years we ended rather abruptly and painfully (for me). But it was for the best.

Current therapist is happy to disclose stuff, if asked. He won't volunteer personal info but if I start asking some questions about, say, where he will be going on his next holiday he will gladly give me details about where he's going, method of travel, etc. He might then ask why it's important for me to know and he's very empathetic if I talk about my concerns/feelings around whether he'll return safely, missing him while he's gone, wishing he weren't leaving, and that sort of thing. He makes LOTS of space for that kind of discussion.

Personally, I find that his open method works great for me. I've become less relationally anxious and more comfortable knowing there aren't really any topics that are off-limits in our therapy sessions (including my love and care for him). As a result, I don't tend to ask too many questions about his personal life anymore. I'd rather spend my sessions working on me. But it's nice to know I can ask some questions if I feel inclined. Of course, I'm sure there are limits to what he may want to disclose about his personal life (and I have enough self awareness not to ask overly personal questions) but I trust that he can hold that boundary himself without being rigid or blank-slate.