I always enjoyed Austins promos, though when the "What" chants came about they weren't as good.
As for Ryback, I found he got boring rather quick. The feud with Punk lost its steam immediatly after HIAC. His quick push to the top will only hurt him in the end. I think some time in the midcard would be great for him.
I can't really stand anything the Miz does. Wade and Ziggler both have a lot of main event potential, I would like to see them both in more high profile feuds before putting a championship on them. That's why I don't like the MITB, sets a deadline on a push.