Rebecca at Chasing Cottons is having a quilt back link party so I thought I'd add some of mine.
I usually like to use a 245 cm wide fabric for the backing so I don't often do pieced backings but here are a few I have done anyway.
I loved this print from Saffron Craig so I used it on the back of the "owl" quilt in a similar way to a panel. I also used the aqua/brown colourway of the same print on the back of another one.
And I used a shot cotton on the back of the Colourbrick quilt as sometimes the effect of the quilting can be lost on more patterned fabrics.
There are some great ideas for quilt backs linked up already!