pb1711:
It might be on BOH cause it may be an easy birdie hole, but a tough eagle hole, well tough in the sense that you will have very few putts for eagle.
That gets my vote. Both par 5's on RSG are easily reachable unless you get unlucky wind. The greens on St. Andrews are both reachable, even if the back 9 one is damn hard to stay on. I've never reached the 16th at Kiawah in 2 but all the others are possible.
Given they needed 4 par 5 holes for BoH and couldn't use Oakmont, they didn't have many tough ones to choose from. Personally I find the 13th at BPB harder, one of the few greens where a 4' putt isn't a certain birdie if you have to go cross green. I play my second shot to #4 to the right of the green and make birdie 95% of the time. Funnily enough my only eagle there was after going for the back pin in 2 and holing the pitch from off the back of the green.