Every time I meet someone from Phoenix I ask if they've been to first watch. Its phenomenal breakfast stands out in my mind more than anything else from the trip (not a lot of competition).
Their french toast is incredible. They have some delicious pancakes with blueberries and everything is fresh and a healthier version (whole wheat as opposed to white flour caked in maple syrup).
If I ever go back to Phoenix, I'm going back to First Watch.