If I'm doing a blanket stitch and I want it to look "hand done" I use Sulky 12 wt black cotton thread and use my heirloom stitch menu on my machine and it will look like you did it by hand with embroidery floss. The blanket stitch on the heirloom menu on my machine goes over every stitch twice. I have a Viking Diamond but I'm sure all the newer machines have a stitch like this.