A word about a technique that has been used for centuries: Ciaroscuro. Or “light-dark”. Meaning the interplay of, often dramatic, light and dark in a picture.
This is not new; artists did the same in 1490. Chiaroscuro helps introduce depth, dimension, into two-dimensional pictures.
Traditionally, Chiaroscuro refers to any darks and lights introducing such modelling; in photography, we more often take it to refer to strong contrasts between the dark and light areas. But in essence, proper lighting is all about chiaroscuro.
And shadows do not only introduce dimension. They also introduce mood, and in contrasty pictures like the one above, drama.
Give yourself an assignment: in your next picture, play with light and dark a bit, and use them to produce depth, character, and mood. Consider using black and white.
And in response to the B/W request: