Personally, I'm not hugely keen on the "tourist Meccas", such as Thailand, Bali, and so on: I've been to Thailand, and while I enjoyed myself, and my trip definitely met my requirement of "being warmer than the 1 degree average temperature with no heating that I had to deal with in China", I found the trip somewhat lacking in general, due to the large number of tourists everywhere. Now, I'm certainly not begrudging the Thai people their tourist industry, and Thailand does certainly have natural beauty and a culture that is worth exploring as a tourist, however when a country is as devoted to tourism as Thailand is, I see two problems.
First of all, when such a large amount of your cultural traditions become intertwined with the tourism industry, it's very easy for the traditions to (at least to an outside observer) appear to be mainly for show. At least in Thailand it's obvious that the people there still embrace much of their traditional culture in their daily lives - I loved seeing people pray at Buddhist shrines, and seeing Elephants walking down the street doing the shopping. Too much commercialisation of a culture, however, serves only to turn those commercialised aspects into a caricature of their former selves. The culture ends up being known and recognised not for its philosophy and literature, but rather for consumer-friendly dances and songs. Now, I was born and raised in a dominant culture, so I can only imagine how those from less dominant cultures must feel, however it seems to me that it would be in many ways demoralising to those from developing, tourist-industry oriented countries to see their remaining culture being seen as a sideshow to those from richer nations who come to visit at their leisure. It's a question that I really should ask some of the locals next time I go to a tourist resort region.