In my stumpwork projects I often use long and short, or at least a reasonable approximation, for shading and filling petals and leaves and such. So I thought I'd try doing counted long and short to get a real feel for the stitch. I also wanted to experiment with colours and shading so I made a rainbow band of sorts. I had a harder time than I expected getting four shades of the same sort of colour, I guess that means I need to add to my stash:-) But it was very interesting to see how the shades worked together or in some cases didn't - although I guess it would depend on the look you were going for. The small red sample is done with 2 strands of overdyed silk. I love this colour and I love the way the shading works. It would be quite different with satin stitch covering the same area so I can see the use for this stitch with overdyed threads as well.
Below is a stumpwork version of the watercolour 'portrait' of Jane Austen done by her sister Cassandra. which I have stitched using long and short.