Granite, I've noticed that I often get from my T exactly what I expect to get from him. T's are so blank and waiting to follow the path that we lead them on.
If I go in thinking that he is going to be nice, we will have conversation, and get along well, that is exactly what happens. When I go in anxious, afraid that I won't be able to talk, that is exactly what happens. If I expect him to be nice, that is what I see. If I am afraid, I see danger. I'm pretty sure he's exactly the same both times, it's all in the way I filter and process what is happening.
Good luck with your session tomorrow. Are you taking your drawings?