Its always easier to give someone else ideas on how to do something then actually figure out your own. Ask me how I know this!
When I first saw your top I thought of feathers especially in the borders and outline quilting for the dragonflies. I would get a pretty metallic thread and put like veins in the dragonflies wings.
Here are a couple of sites that I go to to get ideas:
This one has a cute dragonfly design
http://www.stensource.com/cat_result...index=quilting stencils&resultpage=
You need to scroll down to see these:
http://www.allcrafts.net/quilting.htm