Winter

I like this a lot, it has a gentle roughness to the shadows, you didn't go out of your way to smooth it all in, its a nice effect.
I'm not too sure about the highlights on the eyes, normally they are kept in the same position on both eyes.
Other than that, I like the highlighting on the lips, and the way you've drawn the loose strands of hair, as well as the realism and shading of the eyebrows.
Really nice work.