Yes, the South. I did not find the holes all that memorable. The caddies were just a couple of junior high school kids. The course is a top notch parkland-style course but the setting is nothing special without the history of all the major championships ,etc... Would I rank Oakland Hills - South higher than 99% of the courses I have played? Yes. But for a "Top 10" course it didn't measure up to me, personally.
The OP asked to describe the courses in one word. I could have said "Trees" or "History" but the word I posted was the first that popped into my head.
Thanks. What makes OH South great is the way Donald Ross routed the holes to make best use of the land. Look at the par 3 9th and 17th. Two great long par 3's with nasty greens naturally set into a hill. 11 is one of the great shorter par 4's in the country. 15 with the central bunkers is a great risk reward hole and 18, with it's narrow green is another risk reward hole, this time a par 5. Also, the greens make the course. It's not a beautiful setting but few courses are like Augusta or Pebble Beach.