I like to use sheets as well. These days I find flat sheets are hard to find on their own, as usually sets are sold. I find the flat sheet doesn't wear out nearly as quickly as the bottom sheet and the pillow slips, so the last few times I bought a sheet set, I saved the flat for a backing, and reused the old flat sheet for my bed. It doesn't always match, but so far no one is complaining. I find 300 thread count or less works best.