Totally Agree! ... adorable!
I'm like you
@eparys and see gentle curves.
@dpendleton ... what I am suggesting, you can do via straight stitching, and give the pinwheels the effect of some movement. I would stitch on the blue or green pinwheel blades, so that it is curved on each blade and they are all spinning in the same direction. KWIM? as I fear this is clear as mud!! The nice thing is you could stitch across the whole diagonal line of those blades with one line of stitching, and no breaks. You could easily mark the curves with a thin chalk pencil.
Depending on what batting you use, and maybe with the minky you are not using any batting ... then that would determine if you need any quilting in the printed blocks. If so, then I would just do an X-effect, again, you're able to stitch diagonally, all the way across.
?About Minky? ... Is there is any min/max quilting spacing required for it?
I have no idea, and am curious as to whether it matters?
Hope someone can let me know on that, as I want to do a minky backed quilt for myself!