TEPaul,
Please explain the concept to them again, they don't understand the application of both approach and recovery shots.
Cos,
If you hit every green in regulation, then the exercise has no value.
Tom Doak,
I don't know that certain greens, provide a significant disparity between the best and alternate angles of approach.
The front/left slope certainly plays a significant factor at #6, and its ability to receive and repel shots, but at # 7 with its relatively flat green, I don't know that any particular angle of attack provides that much more of a test then any of the other angles of approach, and perhaps, that's what makes it such a great green.