As much as you can criticize Facebook for its privacy fumblings and other missteps I have an enormous amount of respect for Zuck for one simple reason:

For someone of that age with so little experience to guide something that started from his dorm room into a (potentially) $100B company in ~10 years while still maintaining effective control of it is a truly remarkable accomplishment. There would have many, many opportunities (and traps!) to exit, get ousted by investors or whatever.

The fact that he didn't cash out and maintained his singular vision is (agree with it or not) a remarkable trait.

He does seem like he has come a long way since his virtual meltdown at the All Things D conference 2 years ago.