I'm with Norman to an extent. I don't view aspect ratio as symbolic. I think it is awkwardly placed into a symbolic role or under a symbolic heading. I do, however, give aspect ratio an important role in how a photo will feel, questions of symbolism aside. I think of it as a baseline, probably not a great analogy, but maybe somewhat like I think of a matte or glossy finish to the paper a photo is printed on. It's an underpinning. To me, the crop suggestions on Norman's photo, which I would leave as Norman chooses, are only secondarily about aspect ratio. Obviously, any new crop not in the same ratio will necessarily change the aspect ratio. But I don't sense the crops are being suggested because of the change in aspect ratio as much as because of the changes to composition. Now, of course composition and aspect ratio affect each other and are related, but they're not the same things.