Best Park: Park Hyatt Tokyo
Best Grand: Grand Hyatt Shanghai
Best Hyatt: Hyatt Regency Santiago
Best location: Hyatt at Orlando Airport
Best health club: Park Hyatt Cadogan (I think this one recently dropped from the system)
Best service: Tie between Grand Hyatt Hong Kong and Grand Hyatt Taipei
Worst room: Hyatt Regency O'Hare (they have many pie-shaped, extremely small "pod" rooms w/o bathtubs-- I haven't been there in years, but they used to sell these as regular rooms.
Many, many properties ceased qualifying as special after closure of their Regency Clubs. I don't know how the economics stacked up, but I've dropped many Hyatts upon closure of their Regency Clubs.