High contrast can sometimes be a worst enemy...but I feel you pulled it off very well here...the high contrast background blends in with your details...so it looks wonderful, great pose!
Its a matter of personal preference, but I'd like to see more color in your eyes--if you used brighter ambient lighting, or stared at a light, your iris will close up ... And a subtle smile would change the tone of the photo, but that may not be the emotion you're trying to show.