Contrary to what one might expect, Los Angeles drivers are usually polite and predictable. I'd say they're some of the best drivers in the nation - they have to be, if they want to survive.
When I worked in LA, there were many upbeat and entertaining radio programs during the morning and evening drive periods - much better for driver attitude than talk shows. Lohman and Barkley were at KFI 1981-1986 were the best. As you crept along the freeways, you could watch the other drivers respond to the same program you were hearing.

-Joe-