As an art appreciator, I love seeing another artist's process, regardless of the medium. I love looking for the pencil lines under a delicate ink drawing, I like to quiz artists and writers about how they make things. I like to trace the heredity of old folk songs, and I push my knees into velvet ropes at museums, straining to find the skeleton that a work hangs on.
And sometimes I feel a bit cheated if the work is too clean. If the arches that hold up the spires have been too carefully plastered over, then I feel as if I've missed an opportunity to learn something. It's art not made for an artist, and therefore is diminished in it's impact, regardless of how beautiful or delicate the final piece is.
I'm a flying buttress man, I guess.