I think I've built up a reasonable stash and now try to use as much as I can from what I already have. I think it can depend on whether you are a process quilter or a product quilter. (Just found those terms in a Pacific Rim newsletter and think they describe the differences between some of us very well). I have never regretted a piece of fabric I've bought, at least, once I developed a sense of what nice fabric feels like, etc. I have been trying to buy more blenders on sale to go with what I already have.