Scrappy, to me, is taking all those little piece that no one wants and making a quilt out of them. Usually, the colors should be entirely random. If the pink fits best next to the red, so be it. Now, i do frequently separate the lights from the darks to give the quilt depth. Scrappy is all that I do. It may turn out to be a nine patch, four patch, or a one patch. Frequently, it is a string quilt, or the ultimate scrappy and my favorite, a crumb block.