Melbourne being slightly biased towards it has the best nightlife and cultural diversification compared to other states. Weather is pox but at summer time (when it actualy does happen) makes for a fantastic time.
Sydney they have a bridge and shit, nice ocean and stuff don't really know too much about them. They also have a higher cost of living & housing then Melboune.
QLD is sunny 24/7, occosional flooding and the rest of the states are pretty ordinary. Forget about Tazzie the rest of AU doesn't really care about those fockers.
-N