I like patterned backs since my FMQ isn't yet good enough to show off. I also like pieced backs that use up scraps from the front of the quilt. I've only used a wide backing once on a hand quilting project that I'm still working on. Haven't had any problems machine piecing the backs that were pieced. I'm trying to build up a quilt backing stash from fabric that I find at a really good price - say $3-$4 per yard.