Symmetrical & Asymmetrical Balance

Although symmetry is "visually stable" as Mary Stewart puts it in Chapter 10 of Launching the Imagination, to me asymmetrical art is more appealing and  invokes more thought.  Mary's examples of symmetry were offered for the 3D realm of art but its application in 2D is just as important.  Take Picasso for instance.  He was a master at asymmetrical balance.  The more you look at a Picasso, the more you are drawn in imagination.  His creation, Girl with a Mandolin, captured not only the cubism of the day but the wonder of asymmetry.