Lighting: The lighting on this one is simple yet well done. You have no distracting shadows and you don't look to have any blown out highlights.
Color: The browns are very rich and enjoyable. I Especialy like the way the green fades out and slowley disapears from the center in a smooth transition.
Focus: Very crisp image with a nice DOF. I enjoy the details that you captured on the pistle and the granual pollen that has fallen off to the sides.
Composition: I am happy with the composition of the image. Every thing looks to be proportional. However due to the stagering number of macro flowers I would suggest shooting this fro somthing other than a head on angle. Try shooting it from the side a bit or perhaps using dry ice to produce some smoke on the interior.
Overall: other that the fact that the shot is a very common one this is a very nice shot. I feel that any flower shot would hae trouble getting a high placing without havingsomthing special to help it stand out fronm the crowd. But as is it looks like your stock "not to be mistaken with bad" photo. I feel that this is a good image but lacked the wow! factor required to bring this up with the higher rating shots.