My list:
6. Virtual Boy (for the giggles)
5. Wii
4. DS
3. SNES
2. Game Boy
1. NES
The Wii showed that Nintendo is the most innovative of the 3 console makers, and it's the most selling console of this gen (handhelds excluded), but otherwise I think it's not that important.
The DS saved Nintendo from becoming a third-party developer. Many might argue with this, but after the mildy successful GBA and the less successful GameCube Nintendo needed some money. Without the DS, Nintendo wouldn't have had the funds to develop the Wii. They could still tried the Wii, but I doubt Nintendo were willing to risk their whole money, if they didn't had the DS. Combine that with the innovative touchscreen (Yeah, I know Nintendo weren't the first to use touchscreens, but they made the mass appeal), and we've got a winner.
the SNES established Nintendo as one of the most important game and console makers, and brought out probably the best games that ever existed. I still play SNES games today, and many others do the same, many consider it the best console ever made (I tend to disagree because I think PSone was better, but only by a small margin).
The Game Boy pretty much started the total domiance of the handheld market of Nintendo, which no one was able to beat until today. (And please don't me with iPhone etc., you can't seriously consider these handhelds...) If ask people what comes first to their minds if they hear Nintendo, it's the Game Boy. Also the most sold series, Pokémon, helps, too.
The NES is where it all started. Nintendo became a console maker. The biggest gaming franchises like Mario, Zelda, Metroid, Donkey Kong, it all started here. Additonally, Final Fantasy started here, too. The NES is the most important Ninendo console. Fact. Every list where NES isn't first is just plain wrong.
CGI and Boutros, your lists are incorrect. You need to fix them.
updated: 14.01.2012
playing right now: Xenoblade Chronicles
Hype-o-meter, from least to most hyped: the Last Story, Twisted Metal, Mass Effect 3, Final Fantasy XIII-2, Final Fantasy Versus XIII, Playstation ViTA
bet with Mordred11 that Rage will look better on Xbox 360.