Eaglemotors - like everyone said get the job first and then worry.
For the record I'm now based in Oz after some 15 years in HK.
The pilots are very professional,the training is excellent and HK still has a great atmosphere.
Try it first then make up your own mind.
Some young pilots have realised it wasnt for them and gone back to their respective countries flying.
Some have left and come back also!!
What are you flying at the moment???
If its anything less than an airline job then I would say you've got rocks in your head if you never took the opportunity.
I dont know your marital/kid status either.
Overall I would say for a single guy the job is great and down the track there is always the possibility of a basing offshore.
If lifestyle is important as 225 says then try for a job in your current country or go to say Air Mauritius or somewhere in the Pacific!
As a TV commercial I saw years ago said "You'll never never know if you never never go!"