My memory is hazy but I probably found out about HN via Slashdot or via Michael Arrington's HN post [0] from Mar. 10, 2008; so I have been reading HN since before Dec. 13, 2008 and still come back because of some really good conversations that can be had here, compared to elsewhere on the Internet.
0: https://techcrunch.com/2008/03/10/little-known-hacker-news-i...