Tom D. -
Isn't the 1st at Riv a perfect example of Thomas' theories on a 1st hole? A soft start that allows for the golfer to gain confidence and also allows for the groups to getaway without causing a log jam at the tee as the players in the fairway aren't having to fight with too severe of a hazard field? There is also plenty of strategy for the player as he deals with how he has executed his first tee shot of the day. Go for the green in two, lay up to a good angle for a wedge shot that will leave you with a birdie try, or lay it up short of the ditch if you don't want to challenge the barranca.
The 11th for me is hugely underrated as it has great solutions to the routing needs on a very flat, boring part of the course. It seems brilliantly set into the existing barranca and has challenge and then strategy the whole way.
I was also going to mention the 8th and the 13th. The 8th is bold in it's concept, but not in its current execution. The 13th was originally a version of a Cape, but the current trees up the left side make it only a difficult, tree lined dog leg left. There have been discussions about restoring the left side barranca right up to the fairway and removing the Eucs. We'll see.
What about some modern courses? How about Pacific Dunes? I'd say that 2,6,8,9,11,13,16,17 are significant. That's 8 of them.