Trailers:
1) MGSV E3 2014 Red Band trailer. MS kind of ruined the trailer by not showing the full trailer during their conference but the full trailer with Paz's stomach being cut open and ocelot torturing people was very jarring and effective. A fantastic showing of new gameplay features mixed in with character introductions and other cutscenes. Topped only by this latest Death Stranding trailer, but Sony screwed him over by not hosting a E3 conference this year.
2) Uncharted 4 fake 1080p 60 fps realtime teaser. turned out to be bs, and nothing more than a glorified cutscene but it was THE best looking game out at the time. nothing really compared.
3) Forza Horizon trailers. i dont care for the games, but man these trailers are amazing. great soundtrack selection and visuals.
4) Cyberpunk 2077 trailer. I think it's fake like the Uncharted 4 trailer, prerendered at best, completely fake at worst, but it did an excllent job of showing an insane next gen looking world. There is more detail here than in a rockstar game. Hell, it felt like a Rockstar GTA trailer.
5) this black ops 3 multiplayer trailer. it is so well synced and does a fantastic job of showing the all new classes.
Demos.
1) TLOU 2 demo. For ND to blow people away literally five years into the gen is quite something. the gameplay is simply leagues above anything else out there and was the most jaw dropping demo ive seen this gen.
2) Anthem - If this didnt turn out to be fake, this would have taken the top spot. Truly next gen graphics with flying and some great A,I systems in play that we never got to see in the final game. Still, very impressive.
3) God of War reveal - self explanatory.
4) Horizon reveal - Rarely has a game managed to live up to my expectations. they managed to capture the look and feel of those leaked concept art shots and had some of the most unique combat of any game that year.
5) uncharted 4 demo. it spoiled the only big setpiece in the game which is kind of unforgivable but what are you gonna do.