I love everything about this piece. It just goes bang rright into your face, but it doesn't do it in a way that's obnoxious, and a pain to look at. Instead, it catches your eye because when you really look at this piece, you see the detail, and textures, and lines that all add to the effect. I love it.
your composition is pretty solid, no matter what angle i look at it from it still leads my eye around the page. if i were to suggest anything, i would ask you if you have tried imagining what it would be like if there were some negative space between the background of the face to the left and where it intersects with the cheek. to rephrase- along the left side (our left) of the face, do you want to draw the eye down and to the right by butting some white highlights on the face?
i hope that made sense I'm not great at describing what I'm trying to say.
overall, i love the colors, composition, movement, and of course the abstraction of the piece.