I read somewhere, many years ago that when making a scrappy if you have materials that you think clash, keep those fabric patches, blocks or strips at laest three patches, blocks or strips apart and they will never interfer with each other. I have used this idea in my quilts and it seams to work for me and I put everything in my quilts. Happy scrappy! :D
Also if you haven't seen them, some of my scrappy quilts are in "pictures" titled A couple more quilts from UBE.
May 18th. They may help you with ideas. UBE
Peace :D