I'm moving to Thailand in a month and a half. I'll be in Chiang Mai in the north. about 150,000 people. very cool place. Inexpensive, many other ex-pats. Lots of people to ride bikes with (I plan to be the first street fixie).
My parents have been there for 10 years and my sister for three. I'll be there for at least one.
In general, if you get certified to teach any subject, there are many places that will be happy to have you. I'll be teaching secondary school math at an international school. Many places will have schools that allow you to teach in english.