while both Zuckerberg and Hoffman should be emulated and commended for what they've done, I admire Zuckerberg more. He built his company from his own code, marketing, and hustle rather than relying on outside funding, and the echo chamber that was originally linkedin. While nothing should be taken away from companies like linkedin or quora or path, but how much of their success can be attributed to just being part of the echo chamber and knowing the right people. While it is a skill to be part of the right social circles.. Zuckerberg built success without it ( yes pre Sean Parker Facebook was quite successful). More startups today are probably in a closer to situation to Zuckerberg than Hoffman.