The late Pete Jones, who was a serious student of Ross, convinced me that any generalzation about Ross courses is almost always wrong. He claimed he could cite an exception to any rule you offered. I believed him.
The only characteristic that I always seem to find in Ross courses is the "feel". Can't define it, but you can recognize a Ross course by the feel. Lots of what I call "pure golf" holes, rarely spectacular, and very few chances to lose a ball or suffer a penalty. Usually lots of recoverability and a premium on strong iron play. There are many excellent examples of Ross's work, but I suggest that none has been played by as many serious golfers, architects, developers, journalists and other "golf people" as Pinehurst #2. It hasn't been seen on television as much as ANGC or Pebble Beach, but it certainly must be his most influential course. I do know that you often find architects at the Tufts Archives studying his works. Name a architect, living or dead, who has not made the trip to play and study #2.