Double-needle saddle stitching for me, with an awl and 5 or 6 strand waxed linen thread. Learned stitching from the Al Stohlman book from Tandy. That little paperback, "How to Hand Stitch Leather" is a fabulous beginner's bible.

I have used my old Singer for stitching thin leather, and am in the middle of a new sporran that will incorporate both hand and machine work. I prefer hand stitching for the control and the good feeling I get when the project is finished. I don't enjoy the sore fingers, however.