I wouldn't want anyone to think I'm attempting to convince folks on the benefits of relocating anywhere.
Some seek a better life in Australia, USA, Canada or elsewhere.
Some seek a retirement filled with whatever 'rocks their boat' both at home or overseas.
Like you said Andy, we all have reasons to do or not to do something.
Variety is the spice of life.

Here in Davao City the heat and humidity are a real challenge for many folks and it's really easy to understand how that would be a 'deal breaker'
If you cannot find a lifestyle that fits in with the prevailing climate I'm sure it would end up in a miserable life.