It's my home airport, so it gets brownie points by default..
I've flown in and out of this airport a lot - most recently a trip involving leaving Phoenix for work the day after the super bowl. Even then, good ol' Sky Harbor performs well. It's generally clean, generally efficient, has a decent amount of power supplies for your devices - pretty much anything you can ask for while waiting to catch a flight.
I'm particularly impressed with the local restaurants that have taken up shop in Terminal 4. What better way to either remember or be welcomed to Phoenix by than some delicious local treats!