To create the perfect shadows one needs to pay special attention to the direction and strength of the light.
The least flattering light is light coming from directly above our heads. Light coming from directly above our heads creates very unflattering shadow. A very fitting example is from Seinfeld.
Check out my 2 faced experiment...
The least flattering direction of light on our faces is from directly above our heads. Light coming from above our heads casts freakish shadows on our faces. It makes our eyes dark, it make our noses look big and our teeth and smiles dark. No good.