The vast majority of quilts I make are queen or king sized, and I almost always piece my backs -- in essence I make double sided quilts. Family members (only ones lucky enough to get more than one quilt from me) always flip the quilt over to "see what's on the back!" I have used a few wide backings when the top had a zillion seams just to cut down on the weight. I will add that all my quilting is done by check (longarm lady) and she is always interested to see what's on the back, too.