How about taking a piece of black paper and cut it in a few pieces to cover the background ? (So you'd only see the flower without the distracting background). I'd also shoot it (or two flowers horizontally together) from straight in front, without cropping out anything from the flowers itself. For some reason symmetry & patterns really make macro shots stand out. But I like the shots above anyway, well done =) Especially the 2nd shot is a beauty!