Your quilt is lovely. I think I recognize it from Batik Gems (one of the two quilts I have not made, from that book). I think I agree with those who said stippling to make the ciricles pop. Then maybe a simple cross (X) in each of the small squares. Or you could cross-hatch the whole thing - skipping the circles (stitch in the ditch around them instead) and maybe doing something (not sure what) different in the large floral squares.