Join the crowd. I just returned from three weeks of emergency time in Europe. It has changed but to the negative. My impression was grey. People, moods, weather, streets, clothes. The trinity of I, me and myself seemes to have taken over.

Run a spread sheet. Compare cost of living, cost of education, income, potential move up/over, social services, taxes, retirement (it will catch up with you), large necessary expenses such as vehicles, medical coverage, family ties ... What are your expectations 5 and 10 years out? How can you achieve these goals in the US and in Australia?