I don't think I have had this experience. There are certain things my T and I both like (e.g., dogs, podcasts, psychology) but plenty of other things I talk about that she doesn't really comment on, which maybe means she doesn't know about that thing or doesn't like it or doesn't think it's relevant to share her opinion on. I think it's more important to my T that she understands why I like things or are drawn to them rather than spending mental energy on what she personally thinks about those things. That's part of what she means when she says therapy is about me.

With your TV show example, maybe she meant the fun part was spending time with your friend, not the show itself? If this bugs you, I think maybe you should ask about it.