Hi. I am sherwin. I am also new to this website. I saw you wrote to your blog that you want people to comment on your work. so here's what i got to say:
Your sketches are really great. The proportions of the face to the body are all ok. I'm not sure if you actually copy the drawings somewhere but if not, I would say that you have an inclination for portrait. It's always a good start to draw your favorite animes because soon enough you'll be wanting more, something more realistic something real like a face of a real person.
Maybe a great area for improvement would be the thickness of the lines and the play on shadows. See your drawing entitled Soi Fong. The face of the man is ok because it looks realistic, primarily due to the thickness of the outlines of the hair, eyes and other details of the face. However as you go along the body, you may notice how the thickness changes. Try thickening the lines and you'll see the change. Furthermore, since you could already transfer your drawings to your computer, you could perhaps use imaging software to add color to yuour drawing. That's basically what I did with my drawings.