Have you considered 'free flying' as in unpowered paragliding or hang gliding? You have some beautiful coastal flying sites in the Sydney region plus if you feel the need to be challenged a bit more, go inland. I started paragliding about 3.5 years ago and have almost 300 hours, including over 100 inland. Inland flying at over 8000', in excess of 6 hours and 100 km. It's a fantastic sport/hobby. Great fellowship too.