For me (in order of importance):
Kingdom Hearts 3 trailer with release date (would probably cry)
Left 4 Dead 3. 'nuff said.
The Division news would be amazing!
The Last of Us 2 announcement
Evolve release date and gameplay
Some details on Destiny, Final Fantasy XV, and Far Cry 4 would be splendid. Also really want something that lets me know that The Order 1886 is in fact going to be better than I'm worried it will be. I'm also patiently watching over The Last Guardian, which I have incredibly high expectations for (if it ever sees the light of day).
MS: Sunset Overdrive and Fable Legends gameplay. More information on Project Spark, Quatum Break and Halo. Banjo and Kazooie/Conker reveal L4D3 would be great too. Official price drop to match PS4 would slay.
Nintendo: SSB character reveals, Animal Crossing Wii U , Zelda info, new open Mario game, revival of Earthbound series
A new Ape Escape game I couldn't put Million Monkeys down and a new game is long overdue.
It appeared in Battle Royale quite heavily so here's hoping Sony have something up their sleeve.
Meanwhile, I'd love a GT7 and a proper Super Mario title (sequel to SMG2)
How is no one mentioning Uncharted.
Uncharted and Batman: Arkham Knight footage for me. I'm sure there are a lot of other things but those two are the most important.
Final Fantasy XV
X for Wii U
Some new titles from scratch, I am with Rigalo about sequels upon sequels.
Some more footage on Metal Gear Solid 5 and a release date.
L4D3 would be great too. Official price drop to match PS4 would slay.
, Zelda info, new open Mario game, revival of Earthbound series 
I couldn't put Million Monkeys down and a new game is long overdue. 
I want to see Harley.
