I use my rotary cutter on paper, cardstock, felt, fleece, fabric, ribbon, yarn, whatever needs to be cut. I use whatever rotary cutter I pick up at the time. I want a sharp blade with every cut no matter what I'm cutting. To keep a sharp blade using a sharpener, you have to sharpen a sharp blade to keep it sharp. A nick though and it has to be tossed or tedious time spent sharpening it back to new. DH won't sharpen a $5 blade.