I lived in Oz for years and first went there when you did not need a passport to enter the country and loved it over there but now prefer NZ.
My son has an Australian passport and a NZ passport (citizenship by descent) and lives there for the better opportunities but would prefer to live in NZ.
One time I had to go the Australian Consulate in Auckland to renew his passport when it expired and had to show my NZ passport for ID purposes.
They said I should get an Australian passport as well but I could not be bothered, if I was younger I probably would.
Unless things have changed, I could vote over there and 2 weeks I could be getting the dole which I loved stirring up aussies about.