I'm not sure what you are trying to say by saying taking Australia for granted. I had no choice about where I was born, I need not be thankful for it, it's just something (comparitively fortunate) that happened.
You are right, Australians are an interesting people with strength and depth, but the same can be said of every other nation. Australia and its people are no more or less special than any other country.
But, the points you're making are not really true. Our so called liberal "democracy" is an utterly pointless example of two-party idiocy, the current unusual situation notwithstanding. And to describe Australia as "one of the most progressive countries on earth" on the basis of a rather dubious tax, makes very little sense.
Finally, as I'm not a nationalist of any sort, my nationality does not form a significant enough part of my identity that I need to know and love my country to any great degree in order to know and love myself.
I do think that in moving our into the world, we need to know who we are. We need to know what we have to offer and what we need from others.
So first and foremost we are a polity. We are a liberal democratic polity that has successfully limited political power for more than one hundred and sixty years. And we maintained our liberal democracy even during the trying war years. And so we are the sixth oldest continuous democracy in the world.
And what we have discovered is that once we get the politics right, most of the other things follow along.