Social media has it's place. I like Facebook and Twitter - even though it wasn't mentioned in the original post - because it's a way for me to get out quick thoughts at the time, and to check in with friends and family that I haven't talked to in a while. Twitter is used mainly to follow celebrities that I find interesting - in all honesty.
Where forums are concerned, it's been a long time since I've been a part of a forum, and the last time it was part of an online e-fed wrestling website. Forums make me think outside the box, and especially about topics that I normally wouldn't be concerned about. And, with forums, its a chance to meet new people from all over the world, where as Facebook, it's just people you already know.