Aux Quatre Saisons, Oxford and the Hyatt Regency, Singapore would be high on that particular list for me.
For 'resort' type hotels, nothing beats The Royal Palm in Grand Baie, Mauritius. However, even with industry discounts, a rool (well, actually a Boma/chalet call it what you will) works out at around £1,000 per night so it's something I won't be doing too often.
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Happiness is a warm L1011