Tom,
Where is there OB on the fifth at Poppy Hills?
I'm glad to hear the pros struggle on this one too: it's gotten the better of me several times. I find this hole difficult because the three main sections of the green are guarded by hazards quite closely which always makes you play away from the flag. These sections of the green are separated by significant undulations (changes from one level to another) that make it difficult to two putt from the wrong level. The green has water to the right and a deep bunker to the left. The right front of the green is low, the left portion of the green is higher, and the back right portion of the green is separated by a ridge and then slopes away towards the back. When the hole is front right, playing towards the middle of the green leaves one with a put that's difficult to stop coming down a slope. When the hole is back right, playing towards the middle of the green leaves a tough putt over a ridge that's fast at the end. When the hole is left, one has played to the right a bit and often catches the slope down to the right, then has to putt up a significant hill. So, if you manage to hit the green and have played (and executed) conservatively, you are often left with a difficult two putt. I've made my share of three putt bogeys on that hole.
The interesting thing I'm realizing now is that the location of the hole draws attention to the hazard on that side of the green, making one play away from the hole. I bet I aim further right when the hole is on the left since I am playing away from the bunker, and further left when the hole is on the right since I am playing away from the water. I'm having trouble deciding whether RTJ2 is really smart or if I'm just an idiot.