I generally use a blanket stitch, but have, when I thought it would look better, used a satin stitch. Once in a while I use a zigzag or my favorite decorative stitch the feather stitch. I suggest you practice a lot with different shapes, try different stitches and sizes of the stitch. Mark your samples with the stitch, stitch length and width and even the type of thread you used. If using a satin stitch I use a 60 wt. thread so that there is not a lot of bulk on the bottom of the block.