Only console I own right now is a Wii and I personally enjoy it.
I have played Black Ops/MW3 for shooting and online enjoyed them both. Just got New Super Mario Brothers and I got other games like Metroid other M and Mad World. All great games and here soon ill be buying Monster Hunter Tri "sadly the online servers got shut down" and a few others.
To me the Wii is a really great console if you care more about Game Play then Graphic's and even some games on the Wii look amazing even tho its Hardware was just slightly better then the Gamecube.
Like I said early'er No Gamer should want a market that only has Sony and Microsoft in because then it will get to the point where whoever has the best and most fast DLC for CoD/Fifa will win and it will just be boring as hell.
The day Nintendo stops making consoles will be the day I stop playing consoles. While I will get a Ps4 in the near future I want a Wii-U a lot more then it and that is how it is for all Nintendo Consoles.
The only Nintendo console that was kinda bla to me was the Gamecube until I played Legend of Zeld Wind Waker. For a long time I said I refused to play it because of how its graphic's was and once I finally did I loved it
then again I was young then and at that time graphic's did matter to me but now its more Gameplay/Story then graphic's.