Re. the first question posed by Landscaperian in Post # 229:

" a) Is categorization useful for the appreciation of landscapes?"

    I would say that not only it is useful but indispensable for the appreciation of landscapes as it seems to be for the appreciation of all sorts of things.  

 Paul Ziff (in his Essay: Reasons in Art Criticism) poses, rhetorically, the question:

         "Do you drink brandy in the way you drink beer?"

  Although both are alcoholic beverages, that's about all they have in common. (as the only thing that all landscapes have in common is that they are all...landscapes) It may well be that a non-discerning chap might think that they are merely different because of the amount of each required in order to get plastered, but discernment is of the essence if we are talking of appreciation of  brandies or  beers or anything else.

   Ziff (in the same Essay) goes on saying:

   "Generally speaking, a different sort of aspection is performed in connection with  works belonging to different schools of art which is why the classification of style is of the essence. Venetian paintings lend themselves to an act of aspection involving attention to balanced masses; contours are of no importance, for they are scarcely to  be found. The Florentine school demands attention to contours, the linear style predominates. Look for light in a Claude, for color in a Bonnard, for contoured volumes in a Signorelli"

  Point being, that Claude, Bonnard and Signorelli belong to widely different schools of painting; schools are linked to styles, one of the main forms of categorization of artworks (see my Post #225). On appreciating paintings of a particular school we look for qualities or aspects characteristic of that school (style) and not for those that we know beforehand will be absent or play a negligible role. Ascribing to a painting a certain style (one way to categorize it) gives us guidelines of 'how and what' to appreciate the painting; it is in this sense that categorization may be said to be not only useful but indispensable in the act of appreciation of art works.

     I haven't  yet got to the specific question of Landscaperian; this is just a sort of preamble but I promise  that I'll get to it in my next; otherwise this would be too long  and guidelines here are that posts should be short.