I agree! There are so many positives and negatives on both sides. As an Aussie in London, I get worn out when my Aussie friends here go on about things like the weather in the UK. I'd rather focus on the fact I can go somewhere like France for a weekend trip in just an hour! Moving to London suited me because I was young, single and looking for new adventures in a big global city. It was great for me at that stage in my life. But now I'm partnered up and older, when we move back to Australia next year (hoping my boyfriend's visa gets approved) I want to shift my focus to appreciate things like how lucky we will be to be able to jump in the car and make a quick easy drive to somewhere like the sunshine coast on a sunday! & how nice it'll be to raise kids in a warmer climate where we can enjoy more outdoor activities.
I guess it is easy to end up in arguments about this type of thing because people's experiences are so vastly different. Where you moved to in Oz, who you moved with, your age, your interests, your financial situation, your line of work...and so on. Even people in the same city or job could have had polar opposite experiences. We must all be careful not to generalise. All you can really do is talk about is your own experiences, but not assume that they will necessarily apply to other people.