The Wii U is the first Nintendo console I haven't bought or had bought for me (when I was a kid) since 1985. It took 2 generations to do it (starting with Wii), but they lost a consumer finally. After the millionth Mario title, I am just sick of them.
So after being a fan for so long you got sick of Mario games? What were you playing all that time? Non Mario Nintendo games? The ones they still make? Like Zelda, DK, and their other famous franchises?
Mario games are consistently the top platformer games if not the best games overall. You can arguably make a case that both Galaxy games were the best games of the past generation.
Since Mario 64, we have had what 3-4 mainline 3D Mario games?
I do get why with the WiiU people are finally turned off. If the first party games Nintendo has released aren't your cup of tea there are almost zero 3rd party alternatives to play. But if you enjoy Nintendo first party games, it is an absolute must to have. Pikmin 3 is one of the best games I have ever played. W101 up next and then the next Mario and DK.
Holding off on PS4 and or XB1 until next year.