Macquarie Pass, at 2am... Only problem during the day is the sunday drivers and the cityrail busses, Better to go up Jamberoo Mtn Rd its a bit sharper and steeper and no slowpokes....
Kangaroo Valley Rd
Kangaloon Rd
The Snowy river way, Ripper of a road and normally no traffic (everyone goes on the alpine)
There are heaps north that cross the Great dividing range most of which are just like the pass, a little less windy though....