My grandmother used just about anything washable, in her quilts. She was born and raised in the mountains of WV and although the quilts were pretty, they weren't at all fancy. Any pieces of worn-out clothing that could still be of use, were cut and made into smaller clothes (for younger children) or put into quilts. As a child, I was fascinated by the variety of fabrics (my favorites were the flannel blocks). My point is, there's really no hard, fast rule. Modern quilts are much fancier but there's nothing wrong with a country-style quilt, either.
