Bethesda: Not seen yet
Microsoft: 7.5/10 A few interesting new games and backwards compatibility saved the day here
EA: 5.5/10 (too much sports, and what the heck with that constantly shaking camera in NfS???
Ubisoft: 4/10 just meh outside of South Park and Anno, and that's just not good enough.

Bethesda - N/A
Microsoft - 7/10
EA - 5/10
Ubisoft - 6/10

So far, E3 is 6/10. Boring, predictable. Leaks were more interesting.

MS: 7
EA: 5
Ubi: 8

E3: 7.5

Beth - 7 - Doom does not look like what i expected it to. Big surprise.
Ms - 7 - Disappointed with the reveals for H5 and G4. Rest was solid.
EA - 8 - mirrors edge and Battlefornt looks as good as expected.
UBI - 9 - GRW is hands down my game of E3.

Bethesda - 8/10. Just based on the amazing looking Fallout 4 alone.

Microsoft - 7/10. Good solid show. BC could be something but I will reserve judgment to see if it is true backwards compatibility or there will be issues with certain publishers. Hopefully this is not one of those situations where a company is withholding vital information that makes it less attractive then it actually appears.

EA - 6/10. This would be higher, I suppose, if I still played sports games or I was interested in multiplayer games. Battlefront definitely looks amazing but with no campaign or single player mode I will never play it.

Ubisoft - 6/10. Three Tom Clancy games that all appear to be squad based shooters. They look good but again not my thing. Assassin's Creed needed to really impress after the PR disaster over Unity and they did not do that. A CGI trailer instead of gameplay or new features, and nothing really to set it apart or make it feel fresh seems like a wasted opportunity.

Bethesda - 4 (Didn't appeal to me)
Microsoft - 7 (Lots of great stuff shown, but nothing groundbreaking)
EA - 5 (Star Wars and Mirror's Edge; no interest in Mass Effect)
Ubisoft - 6 (Great reveals, but a lot I don't care for)

Battlefront trailer gave me chills. First time in years, gj EA.
Overall, several new games across the platforms, my e3 experience is nice so far. Nothing horrible, and a few really good trailers. For Honor was sweet.

I'm biased too though, Nintendo 11/10 ggwp

Well, to be fair, E3 hasn't really been any good since 2005.

No, they showed me about 6-7 must buys.

South Park, Anno, Division, Honor, Ghost Recon, RainbowSix, etc.

Tom Clancy games are always awesome and fun to play, South Park being my biggest surprise so far this E3 (no leaks), Division looks awesome and like a game you have to make smart decisions. 

So uh yeah they did great. Instead of hating a company for trying their best pushing games while having fun game play.....they showed me games I actually want to play. They did great besides the Derulo thing. 

Bethesda had Doom and Fallout, that's it.

Microsoft pretty much the same as last year's games besides the indies from what I saw from the conference. I don't count colsole type stuff becuase it's not fair to the game developers.

EA had Mass Effect, Battlefront and Mirror

Sony -8
Ubi -7
MS -6.8
Bethseda -6.8
EA -6.7

FFVII remake is a time exclusive plus SFV.
Ubi has South Park, Anno and maybe either of the Tom Clancy's games for me
Bethseda fallout 4 of course
EA SW and Mass Effect.

Let's wait for SE and Nintendo tomorrow on what they'll provide...