The post was fun to read and I can pretty much agree with everything.
One difference that I spotted was the accent barrier. For non English speakers Australia can be painful it doesn't matter how good your English is you find yourself repeating your sentences, or spell out every name in the family including my boys English names (no Aussie could understand the name Dean when it came out out of my mouth). In California no such issues (I felt vindicated when I moved over here) only comments that my English is too British (which is the result of the effort I put to get Aussies to understand me).
Another thing that I miss about Australia is that life aren't serious, every man is with in his right to make an arse of himself any now and then and that's just fine.
One thing that I don't miss is the property obsession, everything in Australia is about the property. We don't build proper highways because we can stuff in a few more units, we don't build a railway because it will generate noise which will hurt the property market in that area. If you want to build a startup it will sense only if it will: speed up building property, help people pay the mortgage on the property, help banks claim the mortgage on the property etc...
All I want to add is that I do wish the Health / Education to be here as in Australia.