I would suggest that speaks more about your social group than anything.

And by which I'm not saying that negatively. You perhaps have a group of friends who are not big social media users or that use Facebook and the like to organise almost every aspect of their social lives.

For me, I would say if I wasn't using Facebook I would be missing out. The biggest thing I would be missing out on would be keeping up to date and in contact with a multitude of friends and family back in the UK where I'm originally from (I live in Australia now).

Sure, there is always email but many friends and family don't use email very much any more and it would be me expecting them to change their habits to suit my preferences.