Zace, Doorhof and Aladyforty... thank you all for your appreciation and healthy comments.
Zace, you are very right, I do like dark backgrounds, specially black. It gives the subject maximum prominance and the skin tones look great with black at the back. That's the reason I mostly use black backdrop. You can say thats a personal liking.
Doorhof, The shoot is already done, so now I cannot try throwing light on the backdrop, however, I will definitely try it in any other shoot. I have modified a pic (below) in photoshop - as you suggested.
Aladyforty, I have mentioned it earlier and I am saying it again, she is not a smoker. It was used for an effect alone. I really do appreciate and respectyour concern about not promoting smoking in phtography. By the way... Thank your for your other comments :-)
I made changes tothe color of the background - in photoshop of cousrse. Better Doorhof?