Trying to disregard the feelings of nostalgia and looking objectively - I'd have to say GameCube as a whole (which shouldn't be a surprise given my username :P). I still love certain things about the N64 - its local 4 player options on games like Smash, Goldeneye, and this was when a 90's favorite of mine, Rare, was really on the top of their game. 15-20 years ago I probably would have said it's that console. Generally speaking though, its blocky graphics haven't aged well and its library is pretty thin. Its controller is also pretty funky in hindsight.
Wii U probably didn't deserve the fate of 14 million sold that it got but there's very little redeeming about it in my eyes other than simply being the first HD Nintendo console. It really only has a handful of significant games, especially when looking at exclusives that haven't since ben ported to Switch. The controller and "miiverse" interface were cumbersome to say the least.
GameCube may have been a weird looking console, but its library was pretty underrated - outside of the mainline Mario and Zelda games which are admittedly weak. It was especially strong when it came to 2nd and certain 3rd party titles. Tales of Symphonia, Metroid Prime series, RE series, F-Zero GX, Eternal Darkness, Monkey Ball, PSO 1 & 2.. not to mention having what I still feel is the best version of Smash Bros.
"We hold these truths to be self-evident - all men and women created by the, go-you know.. you know the thing!" - Joe Biden
