Usually I am all for fall time change (but dread the spring)... now that I have kids it's totally different. DD will now be waking up 5:30/6 AM instead of 6:30/7 AM. Greeeeaaaat!
A couple parts of AZ do change - if I remember correctly one or two of the reservations? We used to live there when I was younger and I remember my parents always having to think before calling people to make sure it wasn't too early/late based on DST.