I used a diamond shape on point, and quilted the whole quilt so that from either side all you see is diamonds. It's nothing but straight lines that look good.
I did a panel one time 36 x 45 with another panel on the back side. I did the diamond pattern on the panels. I then added another 10 inch strip, one side front, batting and back and did a diamond pattern only in the other direction. I did that all the way around the panel, it was much easier to quilt because all I was quilting was the 10 inches.