I stopped being a big Nintendo fan about halfway during the N64 era, the system was lacking the games i wanted and Playstation had all the bigger and better games that i wanted. Then during the GC era my respect for Nintendo went really low, they were getting smashed and not doing a single thing, they had a poor library of games that i wanted and the purple system was very ugly.
When the wii came out i lost all respect that i had for Nintendo, the Nintendo that i grew up loving was dead and they were never coming back. The wii-mote and motion controls were the biggest mistake i could have ever imagined. And the problem became even worse when i used the wii-mote for the first time, it was just very bad and the character never did want i wanted and the lack of a controllable camera with a second analog stick destroyed just about every game where the camera was important.
There is also not a single wii game that i want to play, and i don't see that changing for this entire generation.