I have found that the best work with any model is after you have had a couple of sessions. Putting two or more brains together for ideas and/or directions, does wonders for output.
From the third session with my favourite model, things have only gotten better. We are working on our 8th shoot in almost three years, each one has been quite interesting and we have both learnt from each other.
You will not be dissapointed with your further sessions.