There is no one size fits all for quilter's. What works for one may not work for someone else. Some are happy and productive working in a seemingly unorganized space. Others are stifled in that kind of space. My advice is to find what works for you. If you aren't enjoying your quilting experience, it is time to evaluate. For me, a stash other than leftovers from completed quilts or fabric purchased for a project that didn't work makes me nervous. I buy fabric for a project and finish the project. I don't have fabric that doesn't have a specific project to nag at me. My small serendipitous stash serves me well for applique. That's just me and it keeps me happily quilting. Others find great pleasure in a large stash with no anxiety whatsoever. You don't have to be like anyone else. Find what works for you.