Robert Scoble has an interesting (if dated) post called "Why Facebook has never listened and why it definitely won’t start now". It's a good article with many great points.
He writes:
Zuckerberg is a real leader because he doesn’t care what anyone thinks. He’s going to do what he thinks is best for his business. I wish Silicon Valley had more like him.
I get his point. To run a business effectively, it's not so important to know what your customer thinks as it is to anticipate what they're going to think. And it's clear that Zuckerberg has a vision and is running with it.
Here's where I disagree with that vision.