For me personally, Nintendo wore out its welcome with the Gamecube. The only reason I bought one was to play Resident Evil games, as Capcom went exclusive for the console. I was also intrigued by 3D Metroid, but disliked it after trying a demo so after RE4 I shelved it for good.
Once Wii came around, it was marketed towards casual gamers and I had zero interest in motion controls so in one swift motion they killed any desire to play it. I had also grown bored with their franchise games so with no 3rd party support, older tech, and forcing a controller nobody asked for on us, it was an easy decision.
It wasn't about the name or gimmicks: it was about arrogance. Nintendo chose an Apple approach to designing their hardware and I can't stand that shit.