I don't think there was a clear winner, but in terms of actual E3 presentation I give it to Microsoft (yes, even with the "WORLD PREMIER" voice
). They showed a lot of games, talked about their future, and kept it interesting. A well rounded show.
Sony's "intermissions" cutting to their own panel was pretty bad to the point of me muting large sections of it, although they were saved by their few feature games looking very good (particularly Ghost of Tsushima in my mind). I really wish they had kept last year's style. I really enjoyed that.
EA, while not as atrocious as I cynically expected, was a tad boring.
Bethesda had some great teasers, but until Todd got up there it was pretty cringe. I'm skeptical of Fallout 76, but will likely play it. I'm super excited for Starfield and ESVI, but I'll be containing that excitement for a few years I'm sure.
Ubisoft's was pretty solid (outside of the Just Dance bit, but that always happens). I find myself surprisingly interested in AC Odyssey, which I didn't expect, and I'm very intrigued to see what Beyond Good and Evil 2 becomes.
Nintendo went hard on Smash and not a lot else. Smash is great, but I feel like they could've dedicated more time to other things. I might be biased here as I don't own a Switch.
The PC show had some interesting content this year, but it dragged on.
And last but certainly not least, Devolver was even more WTF than usual.
Just my two cents of course.
I didn't catch Squeenix, but I hear it was short and sweet.