I also believe the traffic and smog in LA aren't that bad, but we say they are to scare away the transplants from back east.
As far as traffic goes I think San Francisco from San Jose up to Frisco and from across the Bay is much worse. Same goes for Boston, only city I won't drive in, NYC, Houston, TX (Just get caught on the 44 one time and see what I mean) and even Seattle lately has really sucked. I think the scarest drivers are in Atlanta. They all remind me of 19 year old blonde girls that we have here in SoCal. Diving too fast, with their faces in the rear view mirrow, putting on make up and tailgating the hell out of everyone. I think California's 19 year old blonde girls teach Drivers ED in Atlanta. I swear.
I also think LA's drivers are better, for the most part and they know how to drive in heavy traffic, having had years of experience.
As to smog, both Atlanta and Denver seem worse to me.
I hope you all disagree with me and think Los Angeles is not a good place to live because its's really getting to be a bitch to drive here.