I love to cut fabric too, but if I love a whole line of fabric, (such as Moda's Bliss...) and want to have a taste of something out of that whole line, precuts are a good way to sample it, without having to buy so many pieces of expensive yardage. I saw an adorable pinwheel quilt on this board, which gave me an idea of what to do with some charm packs. I got a really good deal on 3 sets of Bliss charm packs, from a seller on Etsy.
I love Etsy for quilting fabric!