More often than not, my backings don't match the color of the thread I'm going to use for quilting, and most often I use the same color top and bottom. I also really like being able to see the stitching pattern on the back. I'm using robotics so the stitching is very uniform. I might feel differently if I was doing FMQ and I was worried about hiding my amateur level FMQ skills, but that is for me, if my skill level was higher I'd be fine doing it.