your skills in drawing realistic are really good, i don't think that there is a "better". but for me your best work (here in deviant art) is this, because there is so much emotional expression in the eyes and in the whole face, also the choice of the part of the face makes it very interesting. it's different to your other works, even when they are more realistic, they aren't that interesting to me because in my opinion they are perfect, but nothing more (no offense!). this one goes deeper. please draw more like this!