Man - I had really hoped to see this one place much higher. Great colors, great model. This was just a fun pic that really made me smile. Excellent image.
There are some very great details in this extreme close-up of this aphid's world - right down to the tiny legs and the eye on this creature. This photo really brings us an up close and personal view of this tiny creature that we would normally not see. Lighting is wonderful for the subject and it's environment are illuminated very well. Hmmmm, while a greater DOF would capture all the details of the foreground and background of the flower I wonder if that level of detail would greatly 'hide' the aphid from view - it certainly may make it harder to notice. Here the lack of detail in the front and back of the flower makes the eye travel to where there is a greater level of detail and thus we spot the aphid more readily. But if anytime in the future you do wish to get a greater DOF where both the background and foreground are in sharp focus and get lots of detail all you need is a tripod, a higher aperature setting (F8 or higher), and slower shutter speed (and hopefully the bug will not move when one is doing this;-) ).
Your control of the DOF here is a marvel. What an absolute pain in the rear this must have been trying to get the right area to show clear and probably quickly with what appears to be a live insect. Nice work.