I was curious as to see my timeline in detail (you can choose an option to see everything you've posted including stuff on other people's walls), so I went through it one evening and deleted everything that was older than 6 months, apart from photos. Some pretty silly posts from 5 years ago which I'm glad I've deleted.
Call me weird, but lately I'm trying to tone down my presence on Facebook, and the less history there is on there, the better. I just wish there was an option to keep things that are only a month old, and after that they get deleted.