Hwy 33 just north of Mira monte is epic fun with zero traffic. I hit it 4 times going to and from SoCal to NorCal and I think I've seen like two cars and one bike in ether direction. I look for reasons to need to go to LA just to hit that road
Hwy 1 is fun but there's always so much traffic you ether go 20mph or constantly passing over the double yellow. When I ride hwy 1 I try to do it during the summer at like 6am right when the sun rises because no ones away yet