Looking really nice. The only two things I notice are the lines in the tears are a little too "sharp" IE 90 degree corners, as if they were a printed decal. Secondly, the left ear, where the black line circles the bumps. Even if the plastic on the ear is soft and the shape is loosely defined, I would not have let the paint follow the same loose form. I'd kept it square-shaped like on the right ear where the box-shape is better defined.
Just my thoughts on details that matter to few people. You should be proud and happy of your helmet no matter what I think.
PS, don't forget to paint the last triangles that makes the frown really taper out.