The 3ds
The 4 and the bone are the worst consoles ever

owner of PS4, 3Ds and Wii U. Wii U for me is the best console i have, followed by 3Ds. still waiting for the games I would spend 100+ hours on the PS4.

Let's just make this non-biased:

Xbox one-Love the look of Windows? Wish it were the UI for a console? Then get Xbox. And if you enjoy shooters and whatnot, then you'll love exclusives such as Halo.

PS4- Very sleek look for the console. Not only that, but the PS4 had many great games for it. Indie support is amazing as well. If you're looking for specific exclusives, PS4 may satisfy you.

Wii U- Only looking for exclusives? Then you'll probably love Wii U. No third party(which can sometimes be good and a total bummer). However, the exclusives can make you happy for the generation.

Vita- If you(for some reason) hate the 3DS and love Japanese titles, then this will be paradise for you. Hands down dream device for any Japanese-loving gamer.

3DS- Why are you looking for reasons? Dammit, just go buy one. The original 3DS's are going for as low as $100-120 online for refurbished editions. The titles available for the 3DS are too damn high. Come on! There's A 3D KID ICARUS GAME. Do you seriously think it isn't worth it?

MY OPINION:

Frankly I prefer my Wii U since the quality of unique it is out of the ordinary (of course have those exceptions as animal crossing , Mario Tennis yes I have them and others) put epic games like mario 3d world , splatoon , mario kart 8 , smash 4 , pikmin 3 , bayonetta 2 , mario maker, xenoblade chronicles x, dk tropical freeze and others.

Sure the third party games on wii u is very poor but third party's game i playing on my ps3,ps4 and pc ( mainly steam Lord GABEN already made ​​me buy 242 games haha ).

and on handheld i prefer 3ds for Sure,it not only has much more exclusive games, indie and third party however are extremely remarkable game quality for example: Bravely default, Persona q, Pokemon y/x and omega ruby/alpha spahire, all zelda games ( between worlds is the best ), donkey kong, luigi mansion 2, mario 3d land, mario kart 7, yokai watch, monster hunter, many others.

Alright vita have greats first party games too and a good support for Japanese Public and Indies but have saw very few remarkable games Example: Persona 4 Golden, Gravity Rush, Killzone Mercenary, Freedom Wars, Uncharted Golden Abyssis, many others

i have Xbox consoles too but is only for exclusives games.

i did not say anything else.
i was talking about big AAA, high budget, multi million seller exclusives. games that i and may people care about and buy.

I just want to add, that while you can say one is better than the other, these are all very good consoles and each one can provide plenty of quality entertainment.