I think it depends on what kind of quilts you make=
Bright solids for childrens quilts -1 yard of assort. colors
childrens prints 1-1 1/2 for piecing/borders
1/2-1 yard misc. prints for scrappy quilts
tone on tone -background fabrics-2 yards of several fabrics
backing fabrics for crib/lap quilts-2 yards