"The face is where we are. We kiss, eat, breathe and speak through it. It's where we look, listen and smell. It is where we think of ourselves as being finally and conclusively on show. It's the part we hide when we are ashamed and the bit we think we lose when we are in disgrace" - Jonathon Green.
There is a belief that this genre is photography's central project!
Geoff Dyer, author of the Ongoing Moment on the subject of portrait photography ...
"the photographer's aim shouldbe a profound likeness, which physically and morally predicts the subject's entire future."
As I understand, portrait photography is about capturing the essence of a person; the photograph will record the detail surrounding this yet can also reflect it.