I find it helpful. We had talked about one diagnosis early in therapy, then not long ago she said she wasn't so sure that it fit. I asked last session and we talked about the diagnoses she feels fit me better. Major depression was no surprise, but the other one was a bit, although I had been reading about a related diagnosis before that session, and I thought it kind of fit.

My T is not 'into' diagnoses, and I'm not hung up on them either, but they can be useful in understanding myself and in alleviating some shame about my issues being my fault.