I focus my thoughts quite a bit on TOC, although only on some holes. I don't really figure anything great about 1, 8 or even18 although the valley of sin is an obvious dip that can be used almost anywhere on the course. Mainly I like the 7th/11th complex, I have used the bump infront of 4, the ridge on the 2nd green, the slope front left of 16, the trio bunkers of the principals nose, I think 12 is too severe so I guess I bastardise that a bit.
I would like to recreate a '17th green', but would not do an exact copy, 13 I like too.
The easier tee shot left, more difficult approach versus a tough line to the right but easy route in from the left is always in my thoughts.