Problems I see: The biggest thing that I see here is that the left side of her face (model left) is too hot. She blends in to the wall, and coupling this with her face sending you that direction makes me focus and stagnate on the wall just to her left.
#2 There are conflicting shadows in the image. I really like the shadow that comes from her head and the teady bear, however, i would move the light source left to lengthen it. The shadow on the left side of the image detracts from this effect and confuses my eye.
#3 her face is soft, not in sharp focus, I think her pants legs is the sharpest part of the image.
#4 Something doesn't feel right to me in the direction of her gaze coupled with the cigarette. They pull away from each other and I don't spend much time looking at the cig.