Wow! the world is the limit on this one. I am a fan of anything with HST's. The projects are limitless. Anything for the Depression blocks to stars. You can do them in so many sizes and be as creative as you want. Everyone can sharpen their skills with HST's too. Of course there are so many different blocks that use them. You can even come up with a block that is of your own design this way. Happy Quilting!