What I have heard and how I decide to quilt my quilts is that if it's squares do a circular type quilting if its circular do diamonds or lines so pretty much the opposite of the piecing. I use pantographs and don't do custom quilting so for that one I would probably do an all over simple pattern like
http://www.sewthankful.com/Feathers-...-Quilting.html
Whatever you do it will be beautiful!!
Love your quilt you just convinced me to make one for my son, I have been struggling trying to find the right pattern for him....stunning quilt