Brisbane
Pros: Outstanding climate - winter does not exist, it's clear skies and sunny every day. Large enough to get major events. Access to nature. Relatively cheap (compared to Syd/Melb). Good nightlife. Great cafe culture. Good job market.
Cons: Summer is 30-35c and humid often with storms. Max 14 hours of sunlight. Over an hour drive to the 'nice' beaches. Many international departures require a stop in Sydney. Car culture.