I'm mulling over some ideas for a day trip starting and finishing in Newcastle, as I'm feeling the itch for a good drive.
My first idea was to do the Bucketts way, and come back via the Lakes Way in order to avoid the highway as much as possible:

(Google Maps estimates a little under 5 hours for this trip.)
Then there's the possibility of doing the Putty Road, which I've heard good things about, and going out and back via Wollombi:

(Estimated time: a little over 7 hours)
And then there's my most extreme idea, which is to do Thunderbolts and the Oxley Highway. That would be a big day (Google maps estimates just under 9 hours, and that's coming straight back down the Pacific Highway) but on the other hand, people on this forum RAVE about this loop, particularly the Oxley.

So I thought I would look for some suggestions from the forum to see what people think. Feel free to suggest something completely different too.