To be honest, that (Angeles Crest Hwy) is one of the most famous twisty bits in SoCal (with Mulholland Hwy being another). Which means it's probably got too many cars, motorcycles, and those cars/bikes with the flashing blue/red lights and sirens, to be able to actually wring it out and have much fun.
Much like I've heard Deal's Gap gets on a summer weekend--it's more of a parade than anything that will get the heart rate elevated.
But the nice thing about living near mountains is that there are a TON of similar roads that nobody but the die-hards know about--largely because they don't really "go anywhere" that would get a ton of traffic. That is where the real fun happens.