You chose a beautiful model. and I really like the lighting on her hair. Very nice portrait.
The dark shadow upper left behind her head would have been nicer as white without the smudgy feel it now has. Otherwise I think this is excellent work and deserves a very high finish
I like the idea of this. I think it lacks tack sharp focus, which hurts it. If the rose were a really pale pink, I think the challenge would have been served better. The composition is decent. Maybe have her holding the rose, down in front of her, so that there is more negative space to the right. The lighting is right.