Private bungalow with glass walls on a paradise island? Sign me up! Everything was pretty great about the room itself (God bless the air conditioning!), but it turns into a sauna during the day, when you leave it with the air con turned off. Just make sure that you spend the first 30min on your terrace while the room is cooling down.
Other than that? Just outside the village, quiet and slightly hidden from the parties. Beach just in front of the path, bars and restaurants already 50m away, the atmosphere of Koh Rong present everywhere :)