You did quite a few things really well in this shot. I like the color and exposure. Looks like a tough lighting situation that you handled well. The dof is nice and helps focus attention on the flower. The flower is almost too centered for my taste. I'd rather have it higher or lower - probably lower since most of the interest is in the upper half of the frame.
The color is nice and the backlit petals really stand out. Maybe almost too well. It's a nice shot, and I think the score is about right. It doesn't really portray weather as well as some other photos, and might have done better in the flora challenge.
I really liked this image and it seems way underrated. That's probably because some voters didn't feel it met the challenge closely enough. However, looking at it you're pretty aware of the intensity of the sun :)
The blue background looks like it started to pixelate for some reason, and I'm guessing its oversaturated. The blossom is nice but a little too shadowed. It could've been cropped a little tighter to give it a little more size.