Well, not sure if you want opinions on the chevron fabric, but here is mine! If I had to choose between those fabrics, I would go with the green...but...the blocks should be the star of the show and they are already very detailed (and wonderful). Putting a busy fabric around them sort of makes it harder to see them. I personally would go with a plain fabric, maybe in green, but it will be easier to make that choice when you have some more done. Now I am off to learn more about this sampler! Nice!