I disagree with angles being the most important. I think that FEATURES are whats most important.
Features are what makes great golf. It could be a hollow, a hill, a bump, a grind, a crevasse, a road, a fence line, a solitary tree, a sandy blowout, a back drop, a skyline, an old wall or "dyke," a monumental landform, a creek, a river, an ocean, the duneline of a sandy beach, a sloping hillside, even a mountain of rock.
Its how you use all of these features to make the best golf. Most of them are natural, just some of them have to be man-made.
If angles, squares, and circles produce the best architectural prospects of the given piece of land, then so be it.
While Tom Doak will probably dispute the circles and the squares, many of them can be found on some of the best putting surfaces the game knows.