The subject of stitch, as it applies to embellishment, is fairly simple for me. There are many embroidery and decorative stitches, but really I have only a few basic stitches that I use, everything else is just variations on these few approaches. The problem I find with a lot of the decorative stitch out there is that it lies too loose on the cloth and is less integrated into the surface. Even in an art cloth I like the stitching to hold the cloth, being more functional.
Obviously there is the running stitch, which I like to call the walking stitch because I often do it one stitch at a time. This is basically a sewing and quilting stitch, but I occasionally use it to decorate.
By the way, Sharon B has a great Free Stitch Dictionary, if you are interested in learning many stitches.
So I stick to a few. My philosophy is that it is not always the stitch but how you use it and how far you take it that makes the difference.
You might refer to the STITCH LESSON in Spirit Cloth 101 for an Overview.
Eventually each stitch will have its own page here, where I can elaborate on my personal approach.
I am creating separate pages for each stitch, the pages will fill up over time with more about each one.