Perhaps reticence, unease, something like that.
Excellent. It's along those lines.
We have someone here who gets swept by the plot in the first part of a story. It's meant to be quite steampunk- In fact, the very same style as the Professor in my avi.
The piece itself has gone far since the last post. I can post the process so far in steps, animated in .gif form, if anyone's interested.

I should thank Cyangmou for inspiration- When I saw the Sir Gregory and Freya post, It kinda made me want to expand mine to this size as well.
As to your question, that's what figure drawing is. Studying real human beings in positions that signify this or that emotion. If you have the time and means I wholeheartedly suggest working from a model. If you can direct them when they pose, all the better.
I feel like most of this seems forgotten in many sketches I see lately, and methods of teaching. Especially in the gist that is mechanically constructing a pose, or copying them down from sites like posemaniacs. It's as if the drawings had no essence to them, because of the left-brained focus they're given.
I can see how directly drawing from a model can help; you can really tell how drawings done like this seem to have a life of their own. Their gestures rich in flavor.
Heck, I would try figure drawing directly, today, with someone who's with me, if the weather wasn't so freaking chilly on this side of Morocco. Posing naked on *2-*6 celsius isn't nice, and these arabs don't have any sort of room heaters in the hostel im staying.

On second thought, I question the very existence of heating systems here in it's entirety.