It'd be really nice if we were to switch to permanent daylight saving time. I really hate it getting dark before I get out of work in the winter. And if anything, it being dark on the way back from work is more dangerous than it possibly being dark on the way to work, since I'm far more tired at the end of the day.
Arizona is a bit of a special case, due to summer temperatures rather than winter daylight being the driving factor. Let them keep their year-round standard time.