Sydney is nice to visit, but pretty dull to live in, as said above away from the hsarbourside it’s nowt special. (The matrix was filmed in Sydney, the film-makers wanted a bland, stereotypical city)
Rural NSW has some nice places to visit though.
The blue mountains.
Dubbo (the zoo is great, no fences and you ride your bike around it)
Broken hill and Silverton – outback Oz, a lot to do. Take the train there from Sydney.
Wagga Wagga and Orange, nice old towns.
FWIW I hate Byron bay – full of rich hippy kids driving BMWs