Matt,
I agree that Pacific Dunes #12 and #15 are transitional holes, but calling them "filler" does a disservice to them, IMO. I like #12 more and more, but it is somewhat bland. #15, however, is quite an interesting hole (principally, the Foxy-inspired green)--one that I enjoy more than #16 - #18.
It doesn't surprise me that people here love Old Macdonald; however, it does surprise me how quickly some people are downgrading (relatively) Pacific Dunes. Mayhugh has OM as 8-2 over the other courses at the resort (I was assuming the 2 went to PD but perhaps not)!--that's insanity. Maybe OM is just that good (I can't tell you until August 2011 when my trip will mirror that of Michael Underwood). Or, maybe people are forgetting just how good Pacific Dunes is.
P.S. Michael, do you mind if I put my charges on the Underwood tab?