As a handquiter I am always amazed that anyone Stitches in the Ditch. I want my stitches to be visible. The "quilting" is what makes it a quilt. The only time I SITD is if I am making a quilt out of "cheaters cloth". If I hand stitch around each of the motifs most people can't tell it from a pieced quilt. When I "quilt" a pieced quilt I usually echo the piecing lines about 1/4" on each side unless I am doing an overall pattern of flowers or hearts etc. etc.
Just my two cents.