Wind Waker HD, Zombi U, Pikmin 3.
Need more games to play..

Waiting for Zelda U, Star Fox, Yoshi Woolly World.

Don't have one yet, but I've spent a bit of time with some so I have a general idea. So far my favorite is Pikmin 3, I can't help it Pikmin hits all of my weak points for massive damage. ZombiU is fun, haven't played Wonderful 101 enough to judge it but I love everything about the presentation, Smash and MH3U are great on 3DS and surely just as good on Wii U, picking Wind Waker feels like cheating so I'll leave that be.

Most anticipated are as follows:

Zelda >= Xenoblade > Splatoon > Star Fox > everything else

Well Zombi U is the reason i bought at launch, got to say DK:TF is my favourite game, thats the old school platform gamer in me lol Fell in love with Bayonetta 2, none stop action all the way through and the kicker it came with the first game.
Pikmin 3 is incredible, love me some mario kart from time to time, cant wait for Xenoblade & think i may get Splatoon but not sure yet.

My favorite games are: The Wonderful 101, it makes me laugh and has a bit of everything in the form of gameplay, Mario Kart 8, I've tons of fun with friends or in family reunions with this game, Shantae and The Pirate's Curse, one of the best Metroidvania out there, Pikmin 3, I've a soft spot for the little things. I'm still missing 3D World, DK Tropical Fix and Hyrule Warriors, plan to fix that this year and maybe my favorites will change.

For upcoming games, the ones that interest me the most are Star Fox, Zelda, Splatoon and Rodea: The Sky Soldier. I hope that Fatal Frame V can enter that list.

As for features I like from the Wii:
- Backward Compatibility is always a plus, more so for me since I didn't buy a Wii and so I can now enjoy great games I missed from last gen.
- Free and stable online gaming, no need to say more.
- A good number of controllers available, you may dislike one but it's impossible to dislike all of them.
- Miiverse is a nice community
- The VC has many great games I've missed.

Favorite Games: Super Mario 3D World, Bayonetta 2, Wind Waker HD, ZombiU, DKC: Tropical Freeze, Pikmin 3, SSBU, Mario Kart 8.
Anticipated Games: Zelda U, XCX, Splatoon, Yoshi's Woolly World, SMTxFE, Star Fox, Mario Maker.
Favorite Features: I definitely like the uniqueness of the gamepad and how it can make games like Zelda and Pikmin feel so different, while making games like Wonderful 101, ZombiU and Nintendo Land possible at all. I also like Miiverse because it actually feels like a gaming community (although there are some weird posts here and there). And of course I like the free online; not having to pay a subscription is a huge plus for me.

Things I love about console:

-Little, small, silent and not worm console (consumes little very power)

-Very user friendly and colorful OS and eShop

-Gamepad and offscreen play

-Backward Compatibility and VC games

-It can be hacked to play Wii and GC games and NES/SNES/GB/SMDII/SM

-Free and good online gaming

-Big variety of controllers, even from Wii

-Miiverse

- Great games :)

Things I dont like:

- We still don't have N64 VC games (I hope they will come)

- Weak gamepad battery (you can buy stronger one)

Favorite games:

Mario Kart 8
Wind Waker HD
New Super Mario Bros. U
Smash 4

What I like about WiiU:

Netflix haha

To be honest, none. I should have waited for Zelda HD and even now I have my doubts on Aonuma and his ability to produce exciting Zelda games. After the terrible changes in Majora's Mask 3D, I don't know.

Still, these are the games I have enjoyed in my Wii U:

Super Mario 3D World
Resident Evil Revelations
Mass Effect 3

And currently playing: Hyrule Warrios, Mario Kart 8 and Super Smash Bros 4

This year waiting for Xenobalde X and Zelda HD.

I'm even considering on giving a shoot at DonkeyKong Country Tropical Freeze at christmas.

my favorite game - Mario Kart 8. followed by Smash, 3D World, Bayo 2, so on and so forth...
agree on power consumption is little and having a simple GUI to use for navigation and everything.

wanted to have longer battery life on the Gamepad and more games to choose from.

Favorite Games:
Super Mario 3D World (100% twice already, one alone and then with my sister)
New Super Mario Bros U (100%)
Super Smash Bros 
Legend of Zelda: Windwaker HD (Almost my favorite Zelda, amazing game)
Mario Kart 8 (lacks a proper battle mode, but the core gameplay and the DLCs are amazing)
Pikmin 3 
The Wonderful 101 (One of the best games this gen, loved everything about it)

Anticipated (Day 1/Pre-order): Splatoon, X and  Zelda.

Anticipated (Eventually): StarFox, Yoshi. (Bayonetta and Kirby)

What I like about the console:
Backwards compatible with Wii Games (Xenoblade, Zelda: SS, The Last Story and Mario Galaxy so far)
Free online
The GamePad and Pro Controller.