Actually, I think you'll find Aussies are pretty much everywhere. We like to travel, and sometimes we stay in a place we like. I eventually settled in France because the snow here is better than in Australia and it gives me an opportunity to learn about a lifestyle (food, drink, language, society, weather, everything) that I find interesting. Also, I hated the heat in Australia. Just too hot.

As dmarkd said, everyone is different: their reasons; their tastes; and their circumstances.