What type of zombie makes a better movie?

I’m speaking in terms of how to depict a zombie in a movie? Fast zombies? Slow zombies? Crazed zombies? Mutated Zombies?Examples of fast zombies would be Dawn of the Dead; Slow zombies like such in Shawn of the Dead; Crazed zombies would be best described as what you would see in 28 Days(or Weeks) Later; and Mutated zombies would be those depicted in Resident Evil.

If you were making a zombie flick, which kind of zombie would you choose to depict, and why? I ask because I recently got into a friendly debate on Facebook with real-life friends about the upcoming World War Z motion picture based on the book.

Here is a good link for a reference on the new World War Z motion picture coming out soon. For those who have read the book – do you think that making the zombies “fast zombies” was a bad idea and how would you have produced the movie if you disagree with what you’ve seen?