buy what you like that when you look at it you see a dozen different projects you could use it for...if you love it you will use it...regardless whether it is a novelty a solid or a print. try to find some coordinates that go with many different fabrics, and dont forget the neutrals...my stash always seems to be lacking a selection of neutrals...and greens...i don't know why but i seldom seem to have what i need. it also kind of depends on what types of quilts you make...kids quilts mainly? lots of bright colors and novelties...more cottage quilts? big florals in pastels are going to be the ticket... traditional quilts? reproduction fabrics... see lots a choices, but it really boils down to what you fall in love with and feel you have to have...and buy as much of it as you can afford, because you may never be able to find it again.