Tonight the short poses didn't work well for me, and the longer ones, drawn larger, did. I never know from one session to the next, and I have no idea how it works. I just show up and do my part and the muse does (or doesn't) do the rest. We had a lovely model - I also drew her months ago - in pencil. She has lovely lines in her limbs, like the edge of her thigh at the bottom of this drawing, as if her bones were gracefully curved.
These were both 25 minutes, with the method I've been using lately - wash on sketchpad (bad treatment for the paper, but these aren't meant to be framed or kept - and the rumples cause some accidental interest). China marker for the dark lines, and some of the same watercolor crayon that I used to make the wash. 14 x 17 inches - click for larger views (larger than usual).
In the second one of these I deliberately tried to use the wash more, and the lines less. I like it better. Probably over half of the time was spent looking, figuring out what would make the drawing work better and resisting doing things I shouldn't. Over half of the drawing time was spent with the brush, not the crayons. I particularly loved the line of the bottom of her leg, from her seat on the stool down under her thigh and to the back of her foot. And the way the far shoulder looked. The other nice thing about the longer poses is the time to put in just a little context.