Bought my 3DS for Tales of the Abyss and the vast majority of my 3DS titles are 3rd party, so no I primarily bought my 3DS for 3rd party games. As for wii U? Bought it for operation rainfall, X and Shin Megami Tensei X Fire Emblem, so I guess that's practically like buying it for Nintendo games even though the two Wii U games I own for it right now are not Nintendo games.

I don't think both answers are true. PS4 currently don't a lot of exclusives and also no wide variety of games/genres. Still it sells well. So I think people have different reasons for buying consoles. And brand power is among them. The hope on future games is among them. That explains the current success of the PS4.

Especially as Sega All-Stars Racing is really fine for that type of play. Don't get me wrong: I will still buy mario Kart. But so far playing Segas game is good enough, no need to rush MK.

Nahhh I bought it to play Angry Birds

But in seriousness, thats a yes cause I mainly bought it for Zelda and Smash although I m buying mamy other Nintendo and Indie games as well... All the third party hurr durr I can play on my PC at max with 1080p 60fps so I m not really missing much from its competitors atm

You know, that's something I never understood when people talk about getting a console or one they just bought. People in forums act like they're not allowed to ever purchase games that released before they bought the console, as if the day they finally got their own console to take home is launch day.
If I buy a console well into its lifecycle, I'm going back and catchup up on all the stuff I missed. That's what I did when I briefly owned a 360.

And speaking strictly about your little sister GameChaserBE,  are you saying you already acquired NSMBU, SM3DW, Pikmin, Nintendoland, Wind Waker and DK:TF and she's been through all of those already? And you yourself said it's not true you all didn't get it just for Nintendo games, so what about Rayman,  Just Dance 2014 and the other third party games, not to mention some of the awesome indy games in the eShop?

Doesn't mean I don't support good 3rd party efforts.
...but yes

People buy Nintendo consoles to play Nintendo games, where is the excuse?

Yep, as most of my third party needs are filled by Playstation!

Not true for me. I buy Nintendo consoles because I would go a generation without Smash, Mario Kart, Zelda, or 3D Mario.

However, those aren't my "primary" gaming purpose with them. If I would buy all my 3rd party games on my Wii U, I would. I don't believe in buying more than two consoles (a handheld and a home console) for something I consider a casual hobby. I'm not really a hardcore gamer, I'm a proud casual gamer. Unfortunately, we all know that Nintendo gets shit third party support, but even still, I have 3rd than first party games on my Wii U and 3DS.

Too bad this kind of mentality is why wii u is in trouble...