so Kenny you are always on a E3 visa?
or can you apply for citizenship like the the 457's here in AUS.
As an expat I'd always be concerned about the risk of a visa non renewal - or layoffs - gets very $$$ moving a family.
I can't speak for the E3 visa; While never part of the master plan, I married a local and have had a Green Card/Permanent residency for about 15 years.
Like everything in life, it's all about pro's and con's. And it's very much a personal decision. I've found over the last 40 something years of living the expat life, that nowhere is perfect. There's always a trade off. Australia.....good beer, weather, schools and I don't have to repeat myself because most understand me but you pay over the odds for it. The US.....cheap cost of living, cars, food, electricity, heating, etc, etc but my son will have a yank accent and I sometimes feel like I'm talking some alien form of English.
If, you're young a single, what have you got to lose? Have an adventure, see another side of life and aviation and go back if it's not for you.