I know that some of these don't fall into the Luxury category, but thought I'd rate them anyway.

The Best
Merrion (Just one of those hotels that my wife and I long to return to time after time)

Really Good
Killarney Park
Osaka Marriott
Las Vegas Four Seasons

Good
Culloden House
Cosmopolitan
Trident (Kinsale, Ireland)
Grand Residence Lake Tahoe
Courtyard Marriott Tokyo Station
NY Marriott East Side

Fortunately, nothing bad, even among the low level places I stayed at but did not list.

Happy New Year!!!