Sony for sure, if you choose MS you're a fanboy. real talk. (JK don't ban me)
TLG, FFVII, Horizon. These games looked amazing. MS had a pretty good showing, maybe if I liked Gears as much as Halo I could have swung the other way around, FFVII remake put me over the edge though. Even if it's just timed, that's huge. Horizon looked great, so happy to not see Borezone. GG seems to be making a really unique game now. I was really banking on Rare's new game to impress me but sadly it didn't. Especially when I found out it was an MMO, game looked like some F2P shit. Maybe people were right about Rare being "just a name". That Rare replay collection was hella sweet though. I guess I'll wait to see how that pirate game turns out, right now I'm not feeling it at all, doesn't remind me of the old/classic Rare. BC is a pretty awesome thing but let's not get carried away here. Overall I have to say Sony won, they just had the better NEW reveals. Halo 5 and Tomb Raider looks amazing though.
MS - 7
Sony - 9 (highest E3 rating in recent memory)
Sorry for the rambling