oh gosh, i like to try a little bit of everything! raiding the scrapbooking aisles in craft stores is always helpful, and bookbinding suppliers are great, but things like magazines and colorful tissue paper can be just as fun and useful. i tend to back more fragile pieces with heavy weight black cardstock for support, so more delicate materials have never been much of an issue for me. good luck with your paper cutting endeavors, i hope you have such a blast with it!