This is a retopo model I did on a scan of the original Nefertiti sculpture. This is a project I have my students do when I introduce them to character modeling.
This is what I believe is “proper topology” for a face: loops around the eyes, loops around the mouth, and nasal-folds. Hold edges where creases are needed and evenly spaced topology in non-creased areas. All 5 sided vertices stars are in the proper place to not interfere with deformations and model is all quads.