Nice post, Rich. The 'continuum' seems the best way to describe it, and the diagonal ridge in the fairway a good example of it. The idea of subtlety is something I've been thinking a bit about; I equate it with peacefulness and the natural, and with the need (and pleasure) of paying attention. I imagine the most subtle of all risk-reward holes might be something like a mid-length Par 4 with a fairly wide, gradually narrowing, and bunkerless fairway; and a large and bunkerless green that's divided in half by a sharply diagonal but very modest ridge, almost imperceptible from the fairway unless you're quite close to it. On a hole like this, the risk-reward 'ratio' would be quite low; only repeated play might even make it at all evident. That's okay by me; actually, that's more than just okay - if that hole were the product of the strictest minimalsim especially, I think there'd be some magic in it. But I guess the consensus opinion is that if an architect built too many holes like that he'd soon be out of a job, or at least out of the running for the best jobs/sites.
Peter