Cypress Point (played it once almost 40 yrs ago so I really haven't played)
Pinehurst #2 (played many times but not the 'new', which looks fabulous)
North Berwick and Lahinch (played many times as courses I could play everyday)
Diamante Dunes (have to go with one of my own, similar to the two above)
...oh, and The Old Course...of course! (which makes 6)