I don’t know the correct terms to explain why I like it so much. Something to do with the simplicity of it. Yet the skin of the face almost looks like an old photo - realistic but slightly blurred/lacking finer details. Haunting is the perfect way to describe it.
I've seen similar pictures drawn by artists that passed away from Alzheimer's and it really shows how sad mental illnesses are for those afflicted by it.
[Three self portraits of Pablo Picasso are shown. The first is a grayscale drawing with realistic form. The second is in color and is a blocky-looking human in a suit of some kind. The third is a highly abstract color drawing with almost zero realism.]