I like to outline stitch around the design elements in my quilts. No matter if they are fused or pieced I stitch in the ditch when ever possible around the designs. You can see here the red stitching around the veins in this fused version of my Dancing Trees. I stitch right next to not on top of the design, Stitching in the Ditch. I have used #30weight Madeira rayon thread. I like the beautiful colors and heavier weight thread because they show up so well.