Patrick:
Most of my decisions would be based on the ground -- that is my legacy, in a nutshell. But I would be very tempted to look for some holes and solutions that I have never got to build anywhere else, either because I never saw the right piece of land, or because it's a type of hole that makes many clients uncomfortable.
The only general criteria I'd have is that the golf course would probably be no more than 6500 yards from the tips, with a par between 67 and 69. I'm assuming that I'm paying for the maintenance here, and that's the best way to keep the playing areas down to size. Plus, it's something that nearly all of my clients would consider "too risky" to embrace, even though there are many admirable courses with pars under 70 -- Swinley Forest, Rye, St. Enodoc, etc. I think it would be very important for someone to demonstrate forcefully to Americans that quality is not all about the total on the scorecard.