Mark,
Well, Mac bunkers are the gold standard (or at least tied with Billy Bell) and many of us have been quoted as saying we are trying to emulate those.
Colt greens have influenced me, as KN always put the mounds on the inside corners of greens, and playing an old Colt course years ago, I noticed rounder greens, with the high points on the outside curves, which gave a nicer rolling edge effect.
I have built about a dozen of the Raynor templates over the years.
I believe most architects, whether they care to admit it or not, store golf hole ideas in their heads, waiting for the perfect opportunity to use the principles of some great or at least favorite hole, by finding the perfect land. After a few years in the biz, certain land forms just suggest certain holes that have been done before.
Its harder for me to pinpoint a routing concept that has influenced me, other than the "triangulation" routing of Muirfield, and in a few cases, the inside-outside loop routing I first encountered at Medinah No. 2 (one of the first courses I played)