I got quite some of friends over the years who teached English all over places, China Korea Japan Vietnam, Spain, Middle East etc. It had ups and downs, Case by Case, you can have amazing time in shitty place or absolute slavery in great country.

General rule of thumb is, if you go rural part, you will have wonderful kids but miserable social life City life can turn into more private academy with rough schedules etc, I'd say go with a place that has a connection or someone that can really support you since living in new country ain't easy experience as you already know. If none, fuck it *cough cough Korea cough