I think samplers like to have some unique motifs quilted in the background spaces as well as the outline quilting. Here is a link to one that I handquilted. Each block is handquilted a 1/4" from the seams and has added quilting in big open white spaces.
http://www.quiltingboard.com/t-107423-1.htm
I can see a lovely feather spray filling up the white star in the upper left hand corner, some cross hatching filling up the squares in the block on the bottom row with the 4 white squares, some swirls of some sort in your snails trail block, etc. Try finding some books on handquilting in your library and see if that can't give you some ideas for motifs. You can audition the motifs my drawing them on tracing paper or on clear vinyl with those pens they use for white boards that wash off and placing over the block to give an idea of what your completed quilting may look like.