2014 was a year without Facebook. I was on it for 5 years, and in September 2013 I downloaded everything on my wall and deleted my account.
Why did I do this? It was because checking Facebook was becoming one more thing I "had" to do, like checking the mail or email. And since it sucks you in and is endless (like the rest of the Internet), it could be a colossal waste of time. And I've always found that not having something (such as a TV for most of my adult life, or a car for three years, or ice cream in the freezer) makes it a lot easier not to spend (waste) time (and money) doing it.
The final nail in the Facebook coffin was its constantly-changing privacy policies, and inflexible rules for what was public and what was private, and how much control I could have over my account. Plus the Facebook Corporation doesn't seem to be the nicest one to be supporting and giving control over my personal information.