Overall or as a whole Los Angeles is not the best. But I live in West LA, (Brentwood), and in that context, it doesn't get any better. I am three miles from the ocean. I can choose to ride between the southern tip of LA County and well into Ventura county. Or I can choose to ride in the Santa Monica Mountain/Hollywood hills that collectively have whatever degree of climbing you desire and lots of beautiful surroundings. The weather allows me to ride comfortably all year round. The drivers of cars are overall pretty sophisticated, cooperative, and obliging to bikes. So when you consider the boundaries or areas where I ride it doesn't get any better IMO. I'm lucky.