Travel Photographer Rick Sammon wrote why he thinks we are so drawn to sunsets and sunrises. His meaning is our draw as humans, but being a photographer, he especially means why we are drawn visually as photographers. He proposes, with affirmation from a RIT professor of fine art, we experience an exhilaration from millions of years ago, passed down through nature to us, meaning the exhilaration of the hunt (which would be at sunrise or sunset, just ask the hunters among us) naturally draws us to the sunrise and sunset time of day.
Fascinating. I will have to respectfully disagree. Not that I am the authority, but it seems to me the reason is staring us in the face. It may sound overly simplified, but do we not like sunsets and sunrises because they are beautiful?