Can an "all-world" course really sneak up behind you though?
Sure sounds like one sneaked right past a few people you've looped for...
There is an interesting remark in one of the World Atlas of Golf editions about Seminole. I'm paraphrasing from memory, but it said something to the effect that a handful of famous architects were asked which 5 courses they would say everyone should study and only 5 courses made everyone's list, and Seminole was one of them. (I hope I got that right, I'll try to look it up at home tonight.)
There are a lot of courses that really challenge golfers in an overall sense. But the best make you think about every shot, and are especially reluctant to give up each stroke - yet they will, given thoughtful, well-executed play. Hope that makes sense.
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Regarding CP, I think when you have seen any particular course a bunch of times, you start to see things that in reality are just things that exist in most golf. Mackenzie spoke of that when he commented on how most see their home course in far better light than outsiders do.