I bought the Wii-U because Nintendo's software continues to be the epitome of excellence and quality in a world where software is shipped beta and in certain instances, remains that way.
I bought the PS4 for it's exclusives, but only a handful. I no longer care so much about third party dark/gun obsessed/violent games, so it collects a lot of dust.
I bought Xbox One for it's online service stability but soured on that console rather quickly and sold it off.