I often ask 'how much fabric do you buy?' when I give a lecture. I, like most of you have lot's of fabric. I usually buy 1/2 yard. I figure; I know there isn't 'enough', which makes me more creative.
And some of it no longer matches my current style. I like the backs of my quilts to be as interesting as the fronts. Rather than buy new yardage for the back,I prefer to use smaller pieces and piece the back. I often include blocks that did not make it to the front of the quilt.
Try it! You might like it!