Ben Simonds posted an extremely helpful link on Twitter today on how perspective and lenses affect portraits. Now technically this article is for traditional photography but the information is equally important for 3D.
After you absorb all the great information in this article, I encourage you to wander around Ken Rockwell’s site. He has a rather large number of articles filled with information that would be helpful not only to a photographer, but to all us 3d modelers.
So time to get a daily dose of education. 😛