Yeah, San Diego has some nice roads tucked away. I love 78; driving an 07 Hertz Shelby set my mind to buy an S197. You did stop in Julian for some Apple pie, right?
OC only really has Ortega Hwy (where I spent the second day of Shelby use), and everybody is on there so it sucks except weekdays between rush hours. LA has a few good ones, too...
It's funny this article hits now. Just this weekend I joined a local meetup group to run Angeles Crest Highway. Think the 78, but amped up. Bonus: they JUST repaved the upper section, so an awesome mountain road, amazingly uncrowded late Saturday morning, and
perfect pavement. It's the road we all dream of driving. The guy I was with made a wrong turn and, oops, we have to drive that section of road again. Darn. It was all worth the 2hr slog on the 5 through downtown LA back home.
Edit: almost forgot. When you want paper maps, go to a AAA office (I assume most of us are members). You can get them there easily & get ones focused on the area you are in.