Polartech: "I guess I need to learn to look at facial features with more accuracy.": Here's what you'd hear in the first year of art school -- stare at people at bus stops, try a few pencil sketches (different tool but it makes you think), read D'Arcy Wentworth Thompson's 'On Growth and Form', study caricatures. My apologies if you are already far along in that. While your perfecting the face, don't neglect body build and posture, and hair (really the hardest part). Are you working toward one example character or a general capability? What's the challenge?