I personally lead dark when you go home, but again, know I am in the minority it seems. I lived in Arizona and as weird as it may sound the lack of time changes was the best part of the place. It's amazing how much of a suck they really are. It's standard time there and none of the sunrises or sunsets really bothered me too much any time, although my oldest who was then like 4 did go through a phase of waking up with the sun in the summer, which was something like 4:30 a.m., and that was no good. But we got on top of that pretty fast!
Still, I am on board with ditching it one way or the other.
Arizona is weird because the reservations use DST and the rest of the state does not, so you could be switching time zones a handful of times depending on where you're traveling, notably in the Tuba City area.