For what I experienced, the Australian, the Canadian and the French lifestyles are at the same time similar and different. It is not easy to precisely pinpoint elements to explain such situation but after a brainstorm with some friends we came up with a few ideas to explain and illustrate differences.
First of all, Australia is a really young country. It may explain the abundant young population but also the group of old people who are still young in their heads. Second, according to some australians, their relax attitude is due to the hostility of their environment. Since you can be killed by a snake just walking down the street, it is better not to stress for everything and enjoy life. I personally doubt this explanation.
Lastly, apart from being calm and happy in all circumstances, many Australians are also vegetarian. This characteristic may seems irrelevant but it actually has impact on what is offered at the supermarket, the quality of the fruits and vegetables and restaurants’ menus where vegetarian or vegan options are always available.
In other words, I think the main difference between Australia and the rest of the world is there really low stress level.
So, to get in the mood before landing, watch “Crocodile Dundee” in the plane and you’ll be ready to fully enjoy your stay.