I'm going to address a few things. These are my opinion only and other Aussies will differ greatly regarding these.
Flannies, ugg boots, trackie daks, Commodore or Falcon utes? It's the uniform of the Bogan and can be seen at the shops in my boyfriend's suburb on any day.
Kangaroos down the main street. Depends on where you live. I live in Canberra, the capital city which has 350,000 inhabitants, and about 10 years ago friends and I saw a roo hopping down Northbourne Ave (our main street). We yelled out the car window at it to stop being such a stereotype and then rang the rangers to come rescue it. My house is near an open space and there are roos there all the time and I have to drive carefully on my morning commute just in case one decides to hope across the road. I live 10 minutes from the city centre.
I don't think we have as many dangerous creatures as some seem to think or as we like to spruik. I haven't seen a venomous snake for about 15 years and I see about 5 redbacks a year, but a quick spray of insect killer and they're taken care of. I think any big mostly empty country will have a lot of dangerous wild animals. After all the US has Rattlesnakes and bears! (How can you not be terrified of bears?)
Our capital city is actually based on Washington DC and was designed by American Architects Walter and Marion Burley-Griffin.
Our constitution was based on the US constitution, with some substantial differences.
Atheism doesn't have the stigma here that it seems to have in the States. And religion isn't a big thing. People really don't care about what religion you are or are not. I don't know the religious beliefs of any of my coworkers.
Racism is accepted to a point but when it becomes overt you'll find people speaking out against it.
Picking an Australian culture or traditions can be quite difficult as we are quite a young country with a large number of new immigrants, so the traditions for different events and holidays differs depending on your family, where you live and your cultural origins. My Christmas is more of a Dutch Christmas migrated to Summer as my Mum is Dutch. The ex husband's family had a traditional English Christmas and my BF's Christmas is just a big family gathering with no set food traditions.
And for alcohol, personally, I drink beer but not VB or Fosters and I quite enjoy your Sierra Nevada beers. The US certainly knows how to bring the hops. Our generic beers are higher in alcohol than the US ones.
One thing I hadn't noticed mentioned is swearing. Swearing is quite a casual thing here IMHO and pretty much the occasional swear word in conversation is barely noticed. I work in a very conservative office and I've heard just about everyone come out with the F-word when something has gone wrong or they got hurt. They find me very quaint because I tend to say darn, gosh and bother.
We are a rich country, especially comparatively after the GFC as we rode it out very well due to our mining sector.
We have a more socialist outlook than the US. Our healthcare is government subsidised, we have a strong welfare safety net and tertiary education is cheap and the student contribution paid through low interest loans once we start working. (And I hate that the spell check thinks subsidised is spelled with a z)
We also don't have quite the military culture that the US seems to. Speaking bad about the military or the wars we are in is not a big thing in my circle or workplace or even in the press, except around Anzac day.
We also don't seem to have an Australian version of "American exceptionalism". It's OK for us and even our politicians to believe Australia is not the best country on earth.
The Southern Cross is often seen as the symbol of the country (Sorry NZ and all other Southern Hemisphere countries. Somehow we coopted it). If you have it tattooed on you though, you may be a bogan.
And this makes my hair stand on end for love of my beautiful country
"I love a sunburnt country,
A land of sweeping plains,
Of ragged mountain ranges,
Of droughts and flooding rains.
I love her far horizons,
I love her jewel-sea,
Her beauty and her terror -
The wide brown land for me!"
(Quoted from AnnaT)