Nintendo. they created the first 3d trail blazers, the first touch screen, mario, link/zelda, donkey kong, motion controls, and who can forget i am error? sony is good for making the playstaions, i still play my ps2 to this day. microsoft? They've made... the xbox, which is way over expensive (at wal-mart a game i saw was 80 bucks) and took the joyticks from sony and nintendo. nintendo has created the nes, the super nes, game boy, the gameboy advanced, the gameboy micro, the wii, the ds, the ds lite, the dsi, (which for you haters, you can download content, take pictures, listen to music, browse the internet, record sound, and you can get apps like a calculator.) the 3ds, i was reading about it and saw a video of the 1st 3ds specific game. it basically has wii graphics.
I do appreciate how Nintendo brought the American video game industry back up after that horrible crash which downed the industry back in '82-'83. Though I just don't really like Nintendo these days. I don't really hate it but I just feel meh.
As for Microsoft I have a slight feeling of antipathy towards it so I am biased. Don't like MS.
Sony, I just love the PlayStation to be honest. Eh, I don't pay much attention to the other Sony stuff aside from the gaming.
I know this doesn't have Nintendo in it, but there was a series of videos made to see which was better (Xbox360 or PS3)
Here is the link to the first video, and from there it goes into 11 other videos. It is actually a more in-depth comparison to see which system is better, based on the controller, hardware, CPU, GPU, UI, online experience, media playback, exclusive games, and the future.