I daydream about my sessions too. Usually I plan the way I wish they would be but they don't turn out that way. In my head, my sessions are more emotional, and I cry. I can picture myself crying in therapy but it never happens. Sometimes I've told my T how I imagine the session to be, but I don't use the topics as a starting point in my session. For me, it's the emotions I daydream about more than any particular topic.