Nicest work on your gestures of your expressions, however, the gestures of these faces could use a little bit more expression, for lack of a better word. Would you care to do 1 hour of more 30 second quick sketches of faces and expressions sketches? As a result, you'd be able to draw your facial expressions a lot less heavier and a lot more lightest and free-est in your range of expressions and emotions.
For more details, please look into the face sketches in the Ben Caldwell book, Action! Cartooning. Let's hope these help.
Polyvios Animations
For more details, please look into the face sketches in the Ben Caldwell book, Action! Cartooning. Let's hope these help.