I like the composition but feel the colours of the flower could do with a boost and a large spot of sensor dust on the right could be removed (if I am being picky!) :o)7
I think the essense of this is zennish with the negative space and floating flower. I don't however like the background color at all. With the paleness of the flower (pale purple and white) the background feels very washed out and dirty which competes with the serenity the composition of the image is portraying. The lighting is good, the focus looks a bit soft around the flower edges. I gave a 5