I am not one to "stock up" as I love to shop for all the new fabrics! I have some fabric I have had for 3 years that I absolutely love, but I wouldn't want a whole lot more that is that old. My quilting friends and I love to check out the new fabric and different LQS's. I have a stash from leftovers mostly. It's not like you can't go shopping when you retire!!
You will figure out what works for you. Enjoy!