hey dude, keep an eye on photo-reffing when it comes to faces. On that last picture post it looks to me like you were in two minds- drawing the hair and the eye covered by shadow (which has caused the eye to become stretched and misplaced in an attempt of correction) and the bottom right section of the face which seems stronger.
Dont forget to flip your canvas often (and early!) to fix these errors. Also try alternative between having an initial linear line sketch and starting with paint colours.
Never Attempt the Possible;attempt the impossible and even if you fail,you'll fall among the stars.