It takes some getting used to, but try posing with Inverse Kinematics on the arms and legs (Dragging the foot or hand poses the entire leg, for example). But in addition to that, make sure that "Auto Balance" and "Use Limits" are set so that you don't twist everything way beyond what they are supposed to look like. When it gets close to what you're looking for, then use the dials to tweak it. Also ... often overlooked are HANDS. Hands can be just as expressive as the face. The tilt of the hand and positions of the fingers can tell a lot about the emotion of a character. And don't forget the eyes ... they are posable too!