When we announced that we were moving to L.A., people groaned and said "Oh, you poor things. You'll have to deal with traffic." Well, here's my take on it. I think Seattle/Tacoma traffic is much worse. You only have 4 freeways in the entire Seattle area! 2 that go North/South and 2 that go East/West. You get stuck in traffic. Literally. There are no alternative routes.
Here people know how to drive in traffic. Even when it's very very slow, it's moving. And I will tell you why CA drivers are so agressive. There are a lot of us on the road. And if you're not agressive, you will not get anywhere. Of course, some are more agressive than others, specifically the idiots racing in rush-hour traffic. But I'll let them get in the accidents while I safely and agressively get to my destination. :)