Sony>Bethesda>Microsoft>Square>Ubisoft>PC>Nintendo for me.
Sony's was just unreal. We'll be talking about that for years to come. They opened with The Last Guardian! I was just recovering from the Final Fantasy 7 remake announcement and couldn't even focus on what Devolver was showing. I literally jumped out of my chair when the opening notes of the Shenmue them played. Scared my wife a little lol.
Microsoft had a good conference as well and I thought it would have been difficult for Sony to counter. I enjoyed Bethesda just a bit more because I love Fallout and Doom looked pretty slick too. Too bad Dishonored 2 got leaked a bit early.
I was really excited for the PC Gamer show, but nothing of too much importance got announced in my opinion. I do want to try out Killer Instinct and Fable on my PC though.
It was a great E3 for the most part and gamers have a lot to look forward to.