I am by means an expert, but in my opinion~ Would be a great picture if the focus was tack sharp. Also finding that goldish circle thing in the top left corner a bit distracting. Beautiful flower though!
I agree with Trenton. Also, one problem with photographing flowers from the top-down (FYI) is that there will be two different focus points - one for the stamen and pistil and another for the petals. So you need to choose one or the other to focus on, choose a different angle, or use a very small aperture.