I'm in the minority, but Facebook literally depresses me (and by literally, I literally mean literally), and I quit long ago. All these words, and no communication. It's like I'm in a crowd, and the only thing I know about the other people in the crowd is what their Tshirts say.
I communicate by email with most of the people I knew on Facebook, and I'm very happy with that communication channel. Because it's actual communication, rather than mere display.
This is also why HN is my preferred news source. Besides the focused yet eclectic aggregation, the comments are actual communication, not just "regulars" on a typical newspaper's comment forum insulting each other. It's been said many times, but I get as much or more from the comments as I do from the articles, not least because I have to engage my brain to comment.