In drawing there is a principle known as “Straights vs Curves” which I think ties strongly into what I like to think as, “Simplicity vs Complexity”. The contrast of simple and complex lines/shapes helps to create appeal in a pose and can also often help to lead the eye to points of interest, usually the complex area of the drawing. Griz and Norm visually explain the idea on their blog here and here as does Rad Sechrist here.
While watching Glen Keane’s Duet, it was easy to spot this idea in action.
I find the principle is easier to apply when drawing than working in CG, while drawing you are much more aware of the use of your lines and negative space than when posing a 3D rig. So out of interest I went through the Tangled Teaser (animation directed by Glen Keane) to pick out points where this idea of Simplicity/Complexity have been applied with CG rigs.