I use the decorative stitches on my regular sewing machine for the quilting a lot on baby quilts :D:D:D
The Serpentine stitch along the seams works well, as you do not have to stay in the ditch, and it does not show if you are a little off when quilting in grids either.
Any of the decorative stitches will work, as long as they are a more open design, and you can elongate them. I usually widen them a little too...as wide as I can and still use my walking foot :D:D:D Elongating and widening them, seems to help them stitch more smoothly as there are more layers than in regular sewing :wink: