Very nice, peaceful and civil mainstream Thai culture
Low crime, safe place (relative to others)
Interesting expat community from all over the world
Expats tend to be Directors and other high level people, and explorers
Abundant and affordable skilled labor
Cheap labor
Inexpensive office space and overhead
Not too strict
Internet is OK, reliable, unrestricted
Stores have practically everything
Relatively free economy for small & medium businesses
Good infrastructure
Public transport goes everywhere
Centrally located for Asia
Low cost of living (with servants)
Lots of things to export
Lovely ladies