"The Wii U is a better secondary console than the X1/PS4"

[Super_Boom]

I think the reason this is said is because Nintendo exclusives tend to be more unique, and consist of a lot of genre exclusives that don't exist in abundance on the other platforms (despite the common forumer assertion, Nintendo exclusives are more varied than Mario and Zelda ;) ). So a gamer with a PS4/Wii U or a One/Wii U would have a larger variety of genres to call upon than another gamer with a PS4/One.

That being said, realistically not everyone is interested in playing a wide variety of genres, instead preferring to double down on their preferred types of games. Gaming forums tend to be a made up of serious gaming hobbyists, which is why people tend to prefer a "buffet style" of gaming over two courses of the same dish. Nothing wrong with either preference, but it's easy to see why someone who plays 30+ hours of games a week would lean with a more varied option.

For me personally, I opted for a Wii/PS3 last generation, as my preferred genre (JRPG), had a wide selection of exclusives on the latter system, though Wii U/3DS and my last-gen backlog are keeping me too busy to look at either of the other consoles this gen. Of course, I barely play 10 hours a week now, so this opinion likely isn't too common.