Rustic (ruhs-tik) :  def.  1. Suitable for the country.  2. Made of rough limbs of trees.  3. Of or resembling country folk.  4. Lacking in social graces or polish.  5. Simple, artless or unsophisticated.  6. Uncouth, crude, boorish, awkward.  7. Having rough surfaces.  8. Lacking refinement or elegance.  9. Charmingly simple.

I think there is an inherent allure to battered old barns, wooden fence posts or rusty nails.  Charmingly simple.