Great work, no doubt ... just few things i noticed. Pls correct me if i'm wrong
Firstly, i personally think tht those wrinkles on the forehead look very unreal "Reason" being too much of neatness, means the wrinkle which started from the extreme left followed a straight line toward the extreme right which generally in Real, breaks many times and is uneven and also it should be more on the center of the forhead or to the max it can go near the end of the front froehead, should not bend on sides. Secondly not so important, the head still looks little box type frm front... if u could fix tht a bit... and again i'll say i'm not the best so i may be wrong
Otherwise its great... keep up the good work.