Love this thread as always [MENTION=680784]bhrubin[/MENTION] - thanks for starting.
Disclaimer: most if not all the stays below were hosted by the hotel.
HIGHEST
Amanoi - it falls just short of the Amankila/Amanjiwo/Amanpulo mark for me, up there with Aman-i-Khas. Incredible hard product with great design, really good food and service too.
Landmark Mandarin Oriental Hong Kong - apart from a couple of very minor things I thought they could improve on (bit ofa spartan welcome...) and my feelings on the room design aside, this is seriously an excellent hotel with a superb hard product and one of the best city hotel spas I've seen, service to match, and excellent food.
HIGH/VERY GOOD
137 Pillars House - excellent location (but def something to consider in Chiang Mai in terms of where you want to be), great design, good hard product with good maintenance, good food, good service.
Fullerton Bay - difficult to judge service on a one night stay but what I asked for they delivered on. Really good hard product, excellent location with good views (just get a Bay View).
MIDDLE OF THE ROAD
The Sanchaya - Didn't expect this at all. Nice easy 'staycation' type of place from Singapore, surprisingly good beach, great design. Needs work on maintenance and service.
Ritz Millenia SIngapore - I was here for an exhibition which makes it difficult to judge - all things considered (huge exhibition) service was really good. Didn't really sample too much food but it was average. The views are stunning (best in Singapore? Probably - especially with that bath...), but the hard product is just so, so poor that I can't seem to get over that. Probably the worst hard product I've seen in a city hotel in a long time.
LOWS
Four Seasons Koh Samui - Surprise hotel of the year for me, in a bad way. I expected a lot more here. Good location (bearing in mind it's Koh Samui), really good hard product with good maintenance. So many service mishaps and bad food (and one great meal - breakfasts were decent).
The Murray - same with The Four Seasons Samui, this really should be higher. The hotel is one of the most photogenic city (non-palace/historic) hotels I've seen, Sir Norman Foster (and partners) first foray into hotels. Maybe built wtih Instagram in mind, but damn it it's so pretty! Rooms and the hard product in general are superb (and one of the few rooms where the TV size matches the distance from bed despite being far away). Falls flat on the food and the non-caring service. Maybe a bit harsh to judge it as a low instead of a mdidling especially considering recent opening.
The Putman Hong Kong - not really a luxury hotel; more serviced apartment turned boutique hotel. For value for money in Hong Kong, if you don't mind the no frills approach (no real lobby, no breakfast lounge/restaurant/cafe but a great location in Sheung Wan) but want the space, this is the place to be. The full floor suites are 1,000+ sq ft, and if you get a high floor, you will have quite a nice view too of urban Hong Kong, with the Kowloon skyline/harbour peeking in the distance. The design is pretty good but some furnishings could do with simplicity rather than just being made to look good - e.g. the sofa... Where it falls short is in service and in maintenance which could improve. Needs far more attention to detail and care - got given towels on the second day by housekeeping that were badly ripped, for instance. But that's partly reflected in the price (seen the full floor suites at ~USD 250/night++, full floor suites with high floor/harbour view at ~USD 300/night++). Only a low by my/this forum's standards - taking into account the pricing (and therefore maybe it's not a luxury hotel to begin with), it's a solid middle.