looks beautiful! i find it freaky you draw stuff like that just from imagination!
i love the samurai and the girl in the first post, you could add some shading to her face, especially at the eyes and the mouth (my suggestion would be to make the upper lip a bit darker and add a shadow between the under lip and the chin) but dont get me wrong, it looks great!
So do the selfportraits, quite light and smooth, i like that too. instead of put more dark shades there you could draw the background fairly dark, which would push the look of the face
and have thanks for visiting my sketchbook man, have fun