Now thats refreshing, yes, the impact of this photo is certainly created by the yellow... nice to see someone achieving that without covering the image in yellow. 10. (Wow, did I just catch myself giving a ten to a flower macro...erghhh!!)
IMO a wider crop and a nice frame would make this perfect (that doen't effect my vote though!). The colors are stunning and you are drawn to the yellow the second you look at the photo. Excellent work and an excellent example of being right on the money meeting the challange! 9