echo quilting is nice when hand quilting- you quilt 1/4" away from the appliques/detail pieces- then another 1/4" - 1/2" outside that---what ever distance you like & continue to (echo) the details.
cross-hatch also looks nice. there are lots of options- do a search of pictures- browse the gallery/customer quilts at the website of the pattern designer & you will also see inspirational ideas.