I was pretty impressed with Nintendo this year. Not with everything but a lot more than last year.
Hyrule Warriors is a big one for me. I'm a huge Zelda fan so this is a must for me, but I also enjoyed a lot of Dynasty Warriors back in the PS2 days and haven't played one in years. So this will be perfect for me as I got to enjoy that Dynasty Warriors craziness, but now all dressed up in a Zelda theme. I was pretty impressed with what they showed off. And the idea of the new Zelda title, I'm really excited to see how this seamless open world shapes out. I knew the Zelda franchise would do this sooner or later. If done right, Zelda has a lot of potential to become Nintendo's most ambitious series both visually and game mechanics wise.
Splatoon also looked like a lot of fun to play and I'd definitely be interested in something like this as there isn't a whole lot of online multiplayer to go around on the Wii U. Especially in the 3rd person shooter genre.
Super Smash Bros. 3DS/Wii U is a bit of a different story for me right now. For a lot of you casual "Smashers", this game is looking absolutely amazing (and you'd be absolutely right!). But as someone who plays Melee and the Project M mod for Brawl fairly competitively, I'm a little disappointed. Even the competitors they had in the Invitational Tournament were not totally impressed. Most of this lies within the physics of the game that take away from a lot of the really competitive aspects of Melee that Nintendo damn well knows is what makes it so popular in the tournament scene today (and if your not aware, the popularity of the tournament scene for Melee is fucking HUUUUGE!). The lack of things like Wave Dashing, L-Canceling, and Edge Guarding are going to put a serious damper in the overall experience for a lot of serious players and could end up just being an upgrade of the very much less favoured Brawl.
Don't get me wrong, Nintendo did do a lot of good thing with this new Smash and I'm sure the game will still be a lot of fun to pick up and play with friends. I'll still get it myself. But considering they went all-out, created the Game Cube adapter w/controllers, plus put on the Invitational Tournament inviting some of the best tournament Smash players in the world and finally acknowledge the very very VERY popular competitive smash scene, it was a little disappointing to see them pay so little attention to the aspect and physics of Melee that make it so popular in the first place. This game could have easily been done to accommodate both Casual and Competitive gamers without any sacrifice.