For a strong black and white image I think you really need to have an absolute black and and absolute white. Real chunky contrast makes a B&W photo stand out. I'm assuming you were going for the look of a low-key image (i.e. totally black background with properly exposed subject), so I retouched the background, and made the subject, stand out a little more. Gray scale can look very flat if there's not enough contrast. Lemme know if you like it! (photography is one of my many hobbies) The gradient looks good to cast a shadow, but if it's a very subtle gradient, you'll lose your subject in the background instead of making him emerge from the shadow and stand out.
Oh, and btw, the Photoshop CS6 beta is available for 60 day trial for free right now!