It's always been my preference to give the US to the great old courses, a "rotation" of sorts to Pebble Beach, Shinnecock, Winged Foot, Oakmont, Pinehurst, Baltrusol, Oakland Hills, (dream: Riviera or LACC (North)). Especcially if those courses reward shotmaking (and not just aereal shotmaking) over attack-and-recover.
Whereas the PGA should stick to interesting, newer designs that promote interesting recoveries - Whistling Straits, Sebonack, Kinloch, Kiawah, Chambers Bay, Erin Hills, and maybe a few others (Caves Valley? Wade Hampton? Colorado or Boston Golf Clubs?)
Oh - and Torrey Hills should never have a major. Ever. Ever.