Facial Features - Digital Sketchdump

I've just put together a bunch of studies I made about facial features. I hope it'll help me to improve my face anatomy. I especially struggle a lot with noses and ears when I make a portrait All the drawings here are mine, with the exception of the two lips that look identical. The upper pair of lips was drawn by the wonderful enayla and the bottom pair of lips is my attempt to replicate it. It comes from a tutorial she wrote. Also, the painted eye and the painted lips are my own features, drawn with a mirror ! I'll try a full self-portrait soon, ah ah