I won't go as far to say I hated it...I'm more disappointed than anything.
The presentation of the presentation was good. I liked the puppets, it was silly an unique. I like it when I hear the little stories about games and their development, it's nice. The way they used Mario Maker to show Mario change into the next character they're talking about in between reveals, that was neat. The actual presentation of it all was great! But I didn't come here for that, I came for games.
They just didn't really show anything that made me go "wow! I'm so glad I own a Wii U/3DS right now!". It was more of a "okay, that looks kinda neat...Show me the next thing please".
Starfox, Xenoblade, Mario Maker and Yoshi's Woolly World were pretty much 'the big games' and they all have something in common...We already knew they exist. They didn't really tell us anything we didn't already know. There wasn't the "OMG STARFOX ZERO!" because we had that moment about 6 months ago already.
Hell, one of those games (Yoshi) comes out here in 2 weeks. Did they really need to waste time at E3 on that? There's more than enough information about it floating already.
'Metroid: Superstar Soccer Adventure' doesn't really look that bad in fairness (and the 'soccer' thing seems to be just a mini game if anything), but it's not really what Metroid fans were expecting, like, at all. We were expecting Metroid, not...This...
Zelda:Triforce Heroes or Happy Home Designer? They look fine but again, not what anybody was really hoping for. Mario Tennis? Yea, sure...I guess...
Compare it with Sony or Microsoft's events and...Well, they friggin' nailed it. Even Microsoft impressed me and I'm really not a fan of the Xbone at all.
They'll probably have something great at their next Nintendo Direct once they've gotten a few of these games out on the shelves and out of the way, but you know who watches Nintendo Direct? Nintendo fans and...That's about it. They should have brought their A game to E3 to win over new fans and they really didn't. What they showed at E3 is what I expect from a direct.
Do we need to? No. Nintendo can do what they want.
Sure they can! But if Sony and Microsoft are doing what the customer wants, where is the customer likely to end up going?