I think rustication and blasting are difficult tests of ones taste. I don't think the generalizations apply. It's a pipe-by-pipe judgement. I have a rusticated Dublin with a bamboo shank by the late Bob Hayes that I value highly, beautifully even rustication that suits the design and flow better than many other treatments would have. The eye of the artist. Likewise, I have some blasts that are deep a grainy in the favored way, that I treasure, but I also have some subtle intricate blasts that have a separate and special beauty that could be missed by the fans of deep and grainy blasts. So I think it comes up to an ability to discern what works on each shape, with each material. I have some quite folksy rustication easily dismissed by many, like a tall LaRocca poker with looped carving, that I passed up for that very reason. Then weeks later, went back on the basis that if it was still there, I'd buy it. It has a separate stalwart elegance that I have come to appreciate. So bypass the rules and categories and look at the pipe. Don't generalize. It's taste, judgement, nuance, sensitivity, experience, knowhow, open-mindedness, creativity, expansiveness. Skip the rules; skip the rules.