I've had closer relationships with therapists, family talks, pets talks, hobbies talks and whatnot.
I've had more luck in treatment when it's purely service/happy client business. That doesn't mean I don't get to know my therapist and connect on a personal level, doesn't mean that at all. I know my therapist is empathetic and compassionate, that she volunteers at a suicide helpline, that she does a ton of research in trauma due to personal reasons (although I don't know what those personal reasons are), and I know she is there for me if I need her to. There are certain boundaries that I don't cross.
I had one T who would talk way too much about his life, his kids' lives, his wife, his travels, and even other clients' issues. Certainly didn't work out. What did happen was that personal veil clouded both our judgements in therapy, the care trumped the professionalism. It's very difficult to separate the two.
It's not like they're waiters and do their best work with clients they prefer... deep personal connection can actually hinder the therapeutic process.
Good therapists who can healthily separate the two and have both things are extremelly hard to find. I've had a few therapists and had one who managed to keep it together.
At the same time, I know it's not impossible to have it. And we're all different, so my preferred way of therapeutic relationship can be different from others' and that's perfectly ok.