Miiverse is a Facebook for Nintendo except it has ten times as much cancer in it.
I have mixed feelings about Miiverse. I use it regularly because I kind of like it, however, lots of people who use it have a non-existent IQ. I give it 5.3232342347735/10.
Vérité et Masques' thoughts:
Say what you will, it's actually better than Twitter as far as casual use is concerned. Yeah, it's filled with idiots, but at least you can find some nice little doodles and some harmless posts on WiiU games like Splatfest and Mario Maker.