Me? I use a mix of techniques. I prefer the look of turned edge applique. I use wash away applique paper in the shapes (there are several brands out there). Sometimes I glue the seam allowances under, other times I just turn it with my needle. Most are invisible hand applique. The red block is an exception - it has such intricate curves, and so little seam allowance, I didn't trust my hand stitching, so it's got turned edges, but I finished it with a very small machine buttonhole stitch. I did the same with the blue shape. And I got brave and did the curvy green shape by hand. Go figure -
And I use a mix of thread basting, glue basting, and pins...
Diane