Good advice above, if you're young and single the move may end up being a permanent one. Two years soon turns into five and five becomes ten. You will most likely end up with an Asian wife, I've seen it happen so many times.
After a while the ties with Australia loosen, visits become less frequent and you watch less of The Australian Network on cable.
Returning becomes less of an option as you get older, you've attained some seniority with your airline and a few more years to a wide body command looks better than the back end of the Virgin list as 35 year old B737 F/O in Melbourne with no expat package.
You soon get used to a higher standard of living, I'm having a few days off in Thailand staying in a 5* hotel in BKK for AUD$100/night including breakfast. Next month I'm looking a diving in Bali.
Go back ? You must be joking.