What is a Good Zombie? What Makes a Zombie look like a zombie? How do you potray the image as an actor or Actress?

These are a few of the questions I would like answers too.
I'm putting this up because I think zombies are just made to look cool on t-shirts and in movies nowa days. I think there whole ripping guts out and devoring the guts has been lost. What does Every else think? Please put your views on this too thanks.