my pick is Bangkok but 1st ill answer your question - sould I move to bali --- ive lived in both and love them both
Your moving in Dec for 8 months and nov thru April is the rainy season -not the best time to be there and nov thru april in Thailand are the dry months - which are the best unless you like the rain
2nd point - internet service isn't as good as in Bangkok
3rd point - Bangkok is a great centerpoint for quick weekend trips with many city's / country's within 1 to 2 hours away with direct flights
Maybe live 6 months in Thailand and 6 in bali ?
I believe Cuenca, Ecuador has it all. Of course you will need a little bit of Spanish to get by