If we're talking trailers, then that initial Breath of the Wild vid was quite something. Tomb Raider I-III Remastered was also great, as simple ports would've done just fine, but the extra work they put in was awesome.

Going further back, I remember seeing pics of Resident Evil Remake for the GameCube in magazines and on websites back in the day. That pushed me from 'I want a GameCube' to 'I need a GameCube'

Yeah this one's an all-time, it'd be almost impossible to top this now that live events are largely a thing of the past. I wasn't really following gaming media at the time so I missed this one sadly, but yeah it's a classic.

Some of mine:

MH Rise; MH3 was my most played Wii game so the series getting a new Nintendo entry was a dream come true

Xenoblade Chronicles X: Back in 2013 the scale and grandeur on display here blew me away