It all depends on what lifestlye you like,
and what hobbies,business you do .
for trading ,,in Asia -pacific region you need to trade the US markets in the evening/night , for the mediteranian region it would be in the afternoon /evening . FX / currency would different times again
what culture do you like ? european , arab,south american or Asians ?
what religion do you prefer,,,christian, moslem or Buddist ,etc.?
each country has specific culture related. to religion.
do you prefer warm climate or cold climate ?
what kind of taxes would you want to pay ?depends on your citizenship deemed residence staus if you can defer taxes . married or single ? then narrow down the choices , take a holiday ,and meet a few people to experience the local lifestyle.