Since you ask, they were Le Meridien, the Athenee, Sheraton Royal Orchid, and the W.
Le Meridien is quite popular with gays, has comfortable rooms, a great breakfast, and a location central to gay activity.
The Athenee is luxurious, with staff males wearing nicely styled tux and tails, has comfortable rooms with a great breakfast. The location is near the BTS to the shopping malls.
The Sheraton gave me a high floor room with a view of the river. At night all of the boats were lit up and it was quite beautiful. From the Lounge, we had a 460 degree view and it was even better.
The W disappointed although I liked it last year. It's right next to a BTS station, but that wasn't enough to keep me there. We left for the Le Meridien again.