Feel the need to chime in on CA drivers. I've driven in probably a dozen states all across the US.
CA drivers are among some of the best. Yes, many of them drive quickly -- but they seem to understand that they are NOT the only ones on the road and see the value in using signals and sharing the road better than most. I only hate driving there because there are so damn MANY of them. At least most of them are doing pretty well behind the wheel -- I think it's really just trial by fire out there. If you suck at driving, you won't be doing it for long. I think no-nonsense is the best way to describe it.
The absolute worst drivers I have encountered are in Maryland/DC area. Good god!