I do mostly queen/king size quilts and I feel the back needs to be as dramatic as the front. I will incorporate blocks, strips, or fabric carried over from the front. I just finished binding a "solar system" queen and had appliqued a half sun in one corner of the front. On the back I appliqued a moon in another corner. The backing is called "Northern Lights" and coordinates beautifully with the deep-space blue of the front.