I was one of the people who rated this shot an 8. I liked the simple effectiveness and sheer beauty overall of the photo. I thought you did a great job conveying the challenge topic, and the composition was very good.
My only thought when I looked at it in voting origionally was that I wished the greens of the stem were a bit darker. I think this would make them pop more and catch the eye better.
Another thing that has nothing to do with my vote, as I understand that people have to work with what objects they have but to make this stronger, IMO, it would help if the leaves of the stem were a bit closer to the rose.
I really like this image; I understand the post-processing (thanks for including that), but I'd love to hear the back story. Was this a setup? Did you find it "in the wild"? It has such nice balance and curves, but I'm also distracted a little from . Wonderfully done (I didn't vote this challenge, but if I had, this would have been at least an 8, probably a 9, depending on how tired I was by the end). I don't understand the 1-4 votes for it, either, by the way.