Every rule or guideline in photography has an exception. A lot of what we like in our images is subjective, although composition and lighting principles give us a common framework to critique our work as well as the work of others. One important aspect of an image is the quality of light.
Here’s a diptych of two faces. It's called “Angry Man/Neutral Woman,” and was created and copyrighted by Aude Oliva of M.I.T and Philippe G. Schyns of the University of Glasgow, in 1997. It is used here with permission.