Wii is actually one of the best (and most underappreciated) Nintendo consoles ever made.
Think about the use of 4 different controls, backwards compatibility, innovative way of gaming.
Then the best games it has to offer SMG1+2, Brawl, Skyward Sword, Xenoblade, MkWii.
In my opinion Gamecube is really the most dissapointing Nintendo console yet. Not counting WiiU, yet.