Awesome.. the top-view one looks especially cool. The one on the bottom-left looks rather odd.. seems to be lacking dimension, like it's a face painted on a balloon. Great detail in the others though
I like the stylization... very expressive. These are great. In an anotomically correct sense, the bottom right head, where it's tilted, has wrong perspective and extreme exagerated proportions. However, this piece doesn't need total correct anatomy. The strokes and colors really bring out great artistic personality and style.
i like this, especially the expression of the face in the top left hand corner. she looks mean.