Despite the wide variety of techniques and approaches seen in "art" quilts today, my favorite is still the plain, flat, unadorned abstract pieced quilt. Hey, that's the kind I make, so you would expect me to like that genre. I think they were better represented in this year's Form, Not Function show than they have been in several previous years. Although the design of these quilts is highly modern in feel, they often carry hints of their traditional heritage, in their geometric forms, often…