I drew a few self portraits but none of them looked anything like me. I'm going to do another one but here is an upclose of my mouth and nose area.

These are two different skull drawings I made of my clay skull. I did add teeth, only because my clay skull turned out a bit lip-heavy and his mouth area looked more like a face than a skull. I obviously messed up on the side drawing's chin.

Analyzing a skull model, I used sanguine to sketch 3 different angles. I had a difficult time shading in the correct places and making the skull look 3D.