Mike, It's always hard for me to say what's the best, but, what I remember most are the interesting routings. Interlachen, Greywalls, Crystal Downs and Highland Links come to mind as very interesting. Interlachen for how the archie turned the course inside, after the first and all the dog legs. It had a few cross overs and a road to cross, twice, yet each sequence was outstanding. Greywalls, for the way Mike went all counter intuitive with the roller coaster start, and, the gentle looking finish. Crystal Downs for it's front nine intimacy, and the back nine's flow. Highlands Links is famous for it's river walk, which really sets it apart as a great out and in routing.
San Francisco GC utilizes it's property as well as any urban course I know, with an open feeling, right in the center of the property, that gets felt several times throughout the round.
There was also something really unique about East Moreland's journey, culminating in a walk off property with views of the city. That juxtaposition associated with urban golf has always tugged at my core. Probably from my days playing Waveland along Chicago's near north shore.