I've never been able to understand Twitter's popularity. To me, it's like a website's comment section without the attached content. And most of the stuff I've seen on Twitter is only slightly better than YouTube comments, and often worse. I know there are lots of Twitter users here -- seriously, I'm not trying to be funny or sarcastic, I just don't get the appeal. What am I missing?
I really think the reason Facebook first exploded in popularity (I was just entering college when it rolled out so have some first-hand experience) was because a whole lot of college age people love to show off pictures of themselves doing cool things, they want the audience. I won't comment on how Facebook has changed, but the original appeal was close to why Instagram is so popular today.
It feels good to have an audience, whether it's for your thoughts or pictures of your life. Not here to judge that as good or bad.