Interesting thread (and good posts, Brent). I know this is not how Phil meant the term, but for me the last thing I want on a golf course is to be "on edge". Indeed, in what for me is an almost intolerably fast paced world and work environment, a golf course is one of only two or three environments where I'm not on edge. And yet there's a fine line - I am a card and pencil type, and "par" does matter to me (to a certain extent) -- and it matters because I want it to matter and I choose for or it to matter; that is part of the "game". (As someone noted once, but not a perfect analogy: the very rules and restrictions of chess are what make the game fun and challenging.) But how a course achieves this, how a design creates a field of play for the game that at one and the same time helps engender a peaceful and calm spirit and a lovely and natural environment and a sane and human pace while at the same time presenting me with problems to be solved and challenges to be faced and recoveries to attempt -- well, that's the great magic trick of gca, isn't it? And off the top of my head, there are courses that manage that trick, the old perennials e.g. The Old Course and Ballyneal and NGLA and Sandhills and Dornoch and Wolf Point etc. There is an 'edge', from what I read about those courses, and especially under differing conditions, but it's of a merciful and gentle quality: the "golfer" is challenged, but the "soul" is at peace.
Peter