Still considering myself a newbie, but I've come to like Hobbs Bleached 100% cotton rather than the Warm & Natural/White from JoAnn's. It's a little lighter weight for our southern climate and I think a softer drape, too. Connecting Threads only has Hobbs unbleached so I wait til Hancock's has a free shipping offer or sale and get several batts of the bleached.
Maybe I'm missing the boat....so many folks are using Hobbs 80/20. What is the advantage of using that over all cotton?