This image is small but it has something very big! The coloring is not highest fidelity but it works hand in hand with the general look and feel. The composition is straight and simple - with a small exception perhaps of the little bit of "flying hair" at the lower right, which somehow contradicts the simple composition. (Perhaps cloning it off?)
But most of all I am stunning about the light. It looks very modern - that kind of almost monochrome that makes images "undercooled". And still it retains much warmth.