What is the character of Australians?

I have lived in Sydney for three years. Generally speaking, Australians are quite good, and immigrant countries are very inclusive. In a big city like Sydney, the relationship is a little weaker but much better than at home. In other suburbs, people will greet you warmly and chat with you. Generally speaking, people are very simple. At first contact, you will find that they are friendly, but it is difficult to make local friends. Many people are polite to meet and nod, and rarely have a heart-to-heart conversation.