Adelaide definately has it's good points especially if your into heritage, small, quiet, laid back cities.
BUT if you are an international sports nut there is only one place in Australia to be and that is Melbourne and unfortantaly im not there

Hopefully will be soon though.
At the end of the day it's all personal choice there is no right or wrong,better or worse but the lifestyle i personally like and my hobbies/interests best suits me to Melbourne.
I have a young family so i can't take the risk of leaving a stable full time job to go to nothing in Melbourne but if a job oppurtunity arises both the misses and myself would jump at the chance.