Country Boys Restaurant is one of the few 24-Hour places open in Scottsdale. It's in the shadow of McDonald's and a few Mexican restaurants but offers the classic diner experience. I found the staff extremely helpful and friendly. They have a great breakfast special.
They would have received 5 Stars, but their Wifi wasn't working (I'm not sure if they offer that). I'm often working on my phone or laptop, so high-speed internet is important for me.