My reaction as a huge Nintendo Fan for the past 18 years.
Star Fox
-Honestly loved it. My big take away was that this is a real Star Fox game and not some gimmicky episodic thing. With Platinum assisting I have no Doubt that it will be the greatest Star Fox since Star Fox 64. Easily the highlight of the conference.
Skylanders Reveal
-Cool, but not into amiibo/Skylanders
Zelda Triforce Heroes
-Kinda neat, looks like a more fleshed out Four Swords. ALBW was great so this could be good too.
Hyrule Warriors 3DS Port
-Have a 3DS, dont want to buy. Hopefully the Wind Waker characters come to the Wii U version as DLC
Metroid Prime Federation Force
-Almost insulting. Both Metroid Prime and Next Level games are better than this
Fire Emblem Fates
-Awesome footage and a much better name. Im excited.
Fire Emblem x SMT
-Cant find the Fire Emblem or the SMT. Cant tell what this is supposed to be.
Xenoblade X
-Japanese reception worries me, but the trailer was awesome
Animal Crossing Home Decoration
-Dont care
Animal Crossing Amiibo Party
-Dont Care
Yoshis Wooly World
-Looks cute, but its clearly finished and shouldve been released about 2 months ago
Paper x Mario and Luigi
-Cautiously optimistic, not sure what to think yet
Mario Tennis
-Meh
Mario Maker Montage
-Looks better than it originally did, but not that exciting
Overall I think a lot of these reactions are knee-jerkish. This definitely was better than 2008 and 2012, but overall was disappointing. Overall about a 6.5/10 on par with E3 2009 and better than their E3 2011 showing.