what foreign teachers don't want to hear
Many foreign teachers forget that they're not in Kansas anymore, and demand that their hosts adapt to them rather than trying to find a middle-ground where a reasonable compromise can be reached. If many foreign teachers are the problem, (and they are), then they are also the solution.
Don't listen to those barstool experts!
Having been warned-- or advised-- that appearance is very important here in Thailand, (just as important as Japan, Korea, or Taiwan I suppose), I set out on job interviews. Most of the advice for teachers on the Thailand websites struck me as either superficial or downright absurd.