What's best is what works best for you. I bought a bolt at Joanns when there was a big sale. It was only 55" wide or so, about the right width for baby quilts. That year I made a lot of baby quilts and used almost all of it up. Other than baby quilts, I was making mostly queen to king size quilts, quilting with a package of batting, but I can no longer handle that size and quilt it on a DSM, so piecing batting isn't such a big thing to me. I plan to start some QAYG, and piece the batting. I've also been doing some table runners as Christmas gifts, and I'll be making some boxes. Those take small pieces of batting.