I'd endorse Thailand. Definitely not a conservative culture for the most part. I lived in South Korea for three years and NE Asia is much more conservative (not to mention all unpleasant hi/low temperatures and the smog in all those big urban areas of China, Korea, and Japan). I've also been in Malaysia, Singapore, Cambodia, and Laos. Once you get out into the countryside of Thailand, it is virtually the same as much of Cambodia, Laos, or (I imagine) Vietnam. I would find a nice village in one of those countries, within traveling distance of a city that had more amenities, preferably on the coast or on one of the large lakes or rivers. (And unfortunately, I'd stay away from living in Phuket, though I enjoyed visiting it; it is exposed to an extremely active megathrust fault that extends north of Sumatra...sooner or later, there will be more tsunamis with very little warning).
Then again, a peaceful SE Asian village was my thought before I got married and had kids. Having a family does complicate things a bit...in a good way. I could see traveling to some nice second homes on a regular basis, though.