The gesture of people
Let’s look at some humans and see where the study of gesture takes us!
The center line runs down the center of the body.
Intersecting lines on a human are shoulders and hips. Drop in some circles, and the figure should start to emerge with a fair amount of action in it.
Even a standing figure has a gesture. When the body is at rest, it isn’t a straight line. Weight gets distributed comfortably.
Of course, if you want to see dynamic action come into your work, the more angles and motion, the better!