I haven't really played many.
On the GW Modern 100 I have three -- Briggs Ranch, Hazeltine and Black Mesa
On GW Classic 100, I have none.
On the GD Public list, I have played Black Mesa and Torrey South
On the Private list I have played only Hazeltine.
In the International list I did manage to get five on a single trip to Scotland -- St Andrews Old and New, Dornoch, Cruden Bay and N. Berwick.
Although, it wouldn't surprise me if some of the courses I have played recently show up. Cottonwood Hills (Faldo, KS), Sugarloaf Mtn (C&C, Fla.) are good bets and Red Rocks (Farris, SD) is deserving.
I agree w/ Sean, seeing some that others think are the best in the world has been enlightening, and sometimes disappointing. For instance, I didn't like Royal Dornoch all that much, and discovered that many of the locals think Cruden Bay is the third-best course in the neighborhood.
I LOVED Brora, however.
Until recently, I made little effort to play top-rate courses because they were out of reach either on price of accessibility (Despite being "in the business," I never expect to be comped, and won't finagle for access)
Ken