MS had the most solid conference overall, but a lot of that was third party. I'm mostly PC so it's fine by me of course. Sony had interesting games and gameplay for their exclusives, but the conference otherwise was probably the worst they've had this gen. The opposite was true for MS. I was surprised by Remedy's game though, as well as Dying Light 2. Those were some of the few actually unexpected things I liked. Sekiro was cool to see, but it didn't wow me. Cyberpunk was expected, and the reveal was good, especially after we got some more details.
From third parties, Bethesda had the most interesting titles for me, but ultimately showed very little. Ubisoft had titles, but nothing really interested me. They had a nice show though, so I enjoyed it even though the games weren't for me. Square Enix had a lackluster showing imo, but at least they kept it short and didn't waste my time. Surprising how little they showed Tomb Raider and FFVII was a no-show. EA was a yawn-fest like usual. Only the Unravel 2 showcase showed any heart, the rest seemed all business as usual for EA.
Nintendo I barely watched the stream, pretty much nothing there like usual. They only have a couple titles in a generation that I'm interested in, as in Zelda and Mario Kart. PC gaming show I also mostly skipped, and what trailers I've seen so far, nothing much interesting was announced. I guess Yakuza is cool, but I don't think I'll play it. I'm waiting for next Xcom title next year.