I'd say mine is about 2/3 chunks, 1/3 yardage. I started buying more yardage somewhere along the way as future projects solidified in my head, so when I shopped I was thinking setting squares and triangles, borders and backs. My yardage is wrapped on bolt boards shop owners no longer need--with their permission, of course.
Keeps the bulk and extra weight out of your drawers and makes it easy to find what you need as they line up nicely in a closet.