I am a few years away from 30. I have disabled FB and Instagram recently so I can free myself from some stress. I use YouTube a lot because I enjoy watching game plays (e.g. H2ODelirious, VanossGaming, etc.) YouTube is a good alternative to TV shows and Netflix.
I never much cared for any of the social media platforms because they all seem to be just gamified crap, a great example of technology making people's lives worse instead of better.
But Youtube and Twitch I like. It's kinda what cable public-access was trying to do, only way better.