I was really into creating these flowers recently. I used colored pencil to both outline and shade in some paisleys of varying sizes, cut them out, then glued them as floral arrangements onto a card for my mom.
I think the texture the watercolor paper adds underneath the colored pencil, combined with physically layering the cutouts onto another piece of paper gives it an enhanced sense of dimension. Considering this design came together on a whim, I was pretty proud of how this card turned out. (Mom liked it too!)