E3 Rankings: Nintendo > Sony = Ubisoft > MS > EA > Bethesda
Bethesda's conference was the worst because they're still milking Skyrim 6 years later, they introduced paid mods, and didn't offer much of anything new aside from Wolfenstein II. I don't have an interest in that series, so to me it didn't matter too much.
EA's conference was really dull. The only interesting game they showed off was Battlefront II, and I'm not interested enough to buy it. Anthem looks like a lot like Destiny, and I already enjoy Destiny a ton. Plus Destiny 2 is right around the corner, and that franchise already has a fantastic community. No point in picking Anthem over it.
MS's conference was actually pretty decent. They just didn't have any exclusives that sold me on the system. Everything is available on the PC. Also, the Xbox One X is over $600 after taxes here in Canada. Yikes.
For Sony...it was absolutely underwhelming compared to past conferences. The presentation was really bad, at least on Twitch. There was scuffed audio on the first two trailers alone, lag throughout the entire stream, and there was just terrible pacing throughout the conference. It could have really used some downtime instead of 30+ minutes of constant trailers that were really dull. Having said that...the actual content was pretty great. Uncharted: The Lost Legacy looks fantastic. Horizon DLC should be a day one purchase for anyone who enjoyed the game. God of War is incredible. Shadow of the Colossus is getting a TRUE remake. Tons of great things from Sony. The low of this presentation was Days Gone (which looks terribly uninspired and generic), and Spider-Man seems like an overdose of QTEs. Ultimately, I think people had horribly unrealistic expectations for this conference. The Last of Us II is a late 2018/2019 title, Kingdom Hearts 3 and FF7R are due out by 2020, Death Stranding is still a long ways out, and there aren't too many other big franchises out there.
Ubisoft's conference was actually decent. They didn't have a cringe host this year, and showed some genuine passion for their games. The dev team shedding getting emotional during the reveal of Mario + Rabbids really sold me on that game, which already looks incredibly unique and full of enthusiasm. Then they showed how much they cared about BG&E 2 with its huge reveal. I also have confidence in AC: Origins, and I love the South Park series. Overall, a VERY good showing from them. Arguably their best E3 ever.
Nintendo is the king of this E3. They built up a ton of excitement for the future with 2018 titles such as Kirby, Yoshi, and other HUGE announcements like a new core Pokemon game and Metroid Prime 4. They managed to generate so much surprise and excitement for the future, and that's without them even announcing new Retro Studios, Smash, Mario Party or Animal Crossing titles which are definitely coming to the Switch. On top of all that, they put out one of the best gaming trailers in years for Super Mario Odyssey. In a year that has already been stacked, Odyssey legitimately looks like Game of the Year material.