This stood out to me: "In his senior year at Exeter, Zuckerberg and his roommate, Adam D'Angelo, wrote software for an MP3 player that was able to learn a user

This stood out to me: "In his senior year at Exeter, Zuckerberg and his roommate, Adam D'Angelo, wrote software for an MP3 player that was able to learn a user's listening habits and build a digital library based on previous selections. Several companies showed an interest in the application, including an AOL subsidiary, but D'Angelo and Zuckerberg had no intention of selling. They didn't care about money. They cared about code. "They were the most advanced computer-science students at the school," recalls Kristopher Tillery, a classmate who set up a site with Zuckerberg that allowed Exeter students to order snacks online." And this: "The way he talked, the way he dressed, everything about him screamed immature," Greenspan recalls. "He seemed unprofessional. I had run a company since I was 15. It just didn't seem like he got it. That whole persona just didn't impress me." Although he was congratulatory at the time, Greenspan now says he was put off by Zuckerberg's original venture, Facemash. "You can spend time writing software for good or evil, and that was pretty close to evil," Greenspan said. "It wasn't that he inflicted harm because he enjoyed it — it was because he didn't care. Which I thought was almost worse."