I've been lucky enough to play some great courses but my favorite is probably Pacific Dunes and Bandon Dunes golf resort. I'm a huge Tom Fazio fan and Diamond Creek in Banner Elk, NC is exceptional. The Ocean Course on Kiawah Island, Spyglass Hill, Pebble Beach are all excellent as well. To me the mark of a great course is one that you could play everyday and not get tired of it.