Melbourne is a large city, and has a lot of suburbs expanding far out from the CBD, from the more affordable Western 'burbs, to the expensive Eastern, and to the stylish modern Northern. And let's not forget the bay at the south.
Extending towards rural Victoria, this area is constantly expanding with new estates, while closer in toward the city are very multi-culture rich suburbs, where you'll find just about anything from any culture around the world.
Known for it's multicultural lifestyle, the western suburbs are an interesting place to be. Also the less affluent district of Victoria's capital, be careful what you eat - because you never know if it's going to kill you.