Usually it's head circle/loose expression, --> torso --> arms/hands --> legs/feet, then I go back and refine things. However, if there's part of the pose that's really exaggerated, like a prominent arm gesture or torso movement, I start with that.
I prefer to leave the details of the face for last, because I know it's my preferred area and if I detail the face first I risk getting lazy with the rest of the body. Kinda like eating your veggies before dessert D: in general my drawings look better if I move around all parts of the figure in stages, rather than fully-rendering one section at a time.