@dk0431,
A whole lot are great and a few are assholes, just as with Americans and Canadians.
Overall though, Americans are suckers for Australians.
When you visit a US bar make sure everyone hears your accent and you probably won't have to pay for many of your drinks and unless you look like a mud crab, you'll attract ladies.
Of course if you diss the USA in your Aussie accent you may find yourself in peril...unless you're in some trendy bar in NY or LA, where they will likely consider you a wise foreigner reinforcing all they hate about their country.
We think you're crazy for living in a land with sharks, crocs, spiders and snakes, and you think we're crazy for livin' near bears, cougars and the cooooold.