The other consideration I make when deciding how to quilt a quilt is avoiding quilting thru seams - sometimes when echo quilting - outlining a bunch of squares, or going around the hexagons in a Grandmothers' Flower Garden, you're quilting thru seams, it's harder to do.
When quilting a quilt w/ a bunch of squares, I might look at putting an X in the squares - avoiding quilting thru the seams.