Pete,
While not related to this thread (as if my offshoot into the sites' popularity) I have always found that an interesting subject.
First, yes, architecture like most other endeavors is 90% sweat and 10% genius, but the top dogs always have marketed themselves as near God like. I took the Oak Park Frank Lloyd Wright studio tour earlier this year and the tour guide was nearly breathless that FLW's inspiration for his style was his German made building blocks he had as a kid. In reality, it sounded like about the least creative thing you could possibly base your design on, but this guy was really selling it as creative genius.....
I also wonder about the varying personalities of the greats in any field, and wonder if there is any real correlation between a certain stereotypical personality type and talent for a certain field. I do know there are tests that sort of ascribe personality traits, and I am on the "designer" spectrum of those. Just not as temperamental (dammit) as the stereotype.
In pro golf you have greats with personalities ranging from the sullen Hogan to the affable Lee Trevino. The stereotype would lean to the more serious types, I imagine, and Lee does have his serious side, but....
So, in the end, almost any personality type can be a great golf course architect. If there is a weakness in one area, they simply have to be smart enough to surround themselves with complimentary talent.