Gus, while I admire your brushwork, I must say that the overall effect doesn't look very realistic to me. The extreme contrasts in the skin tones are over the top in my opinion, especially around the eyes. The skin colours vary from deep reds to white but they don't seem to blend together which means there is a lack of mid tones. I hope you don't mind me saying this, as I'm trying to offer some honest and constructive comments.