Jason,
Darrell nailed it - separation from the background adds to the image, unless you were trying to bury her into the background like I seemed to be trying to do with this one...
You've got the natural separation of her skin and the background.. but could use a bit more separation on the stockings... a backlight would add a bit of a 'rim of light' to those legs and, if you aimed the light carefully, wouldn't have overpowered the delicateness (izzat really a word?) of her skin tones.
Super image, by the way.. get that separation thing going and it's be better, still!
Wayne