My word... T-this is just too extraordinary for words. I'm just... Wow. First of all, I do think this artwork of yours is truly amazing! The beautiful and elegant lines stand out upon your piece of artwork, especially since they're so straight and just perfect.
The head could be a little rounder, but that doesn't matter because I believe that this is one of the best pictures ever to be published on DeviantArt of course! The colour used (black) makes the figure stand out among the whiteness from the background (might I add which is very, very amazing).
To end this, I think it's beautiful. Great work!