I call these things scribblesheets. When I start working with a new model I'll do this for at least half the first session, drawing over and over on one sheet of paper.
It's a warm up, and it helps me figure out how this new person cuts space.
I never considered these anything to show anyone, but one day someone saw a page of this in one of my sketchbooks and immediately lit up. It was obvious this was the only thing they had seen of mine that surprised them or struck a genuine chord.
Since then I've showed them to a bunch of people and most everyone reacts surprisingly (to me) positively.
I know I need to do something bigger and more finished with these.