Few subjects are more ubiquitous in photography than human faces.
Portraits were one of the earliest uses when the technology was new. Naturally, it’s still used for that purpose today.
The human face can convey all emotions a person experiences. It’s seldom that the picture of a face doesn’t reveal something of a person’s feelings at the time it was taken. The camera loves some faces. Others, not so much. It’s amazing how dissimilar the same face can look in different photographs.
Some rarely smile at a camera, while others always do, even if it’s a forced one. The most attractive individuals, usually women, tend to be the shyest about having their picture taken.
I never tire of looking at photos of people’s faces — or of taking them.