Positioning of image elements in the final render is too underrated. Time and time again I see rendered images with no attention paid to the locations of image elements within an image. I try looking at different images and observing the spots I pay attention FIRST (first impression). Psychologically the first impression counts a lot. Renowned artists (those whose paintings sell for millions of dollars) use things like Golden Sections, Golden Spirals and such to catch the eye in where they want and create a peaceful harmony within the picture. Placing a dude in front of a camera and taking a snap shot ... instead of leaving some space (perhaps using a blurred or otherwise harmonic background texture) on the other side of the picture and placing the eye on the exact location of a Golden Section. My two cents.