I liked E3 this year, my favorites were:
º Mass Effect 3 (demos, live Q&A, stage demo, new media, etc, can't wait)
º Warhammer 40K: Space Marine (absolutely hyped, can't wait, being a 40K fan helps)
º Warhammer 40K: Kill Team (see above)
º Skyrim (I likes what I see, me wants, badly)
º Battlefield 3 (obviously)
º Rage (very interesting so far)
º Far Cry 3 (pleasantly surprised by that one, love the jungle settings shown)
º BioShock Infinite (could be good, will keep a look at it)
º Modern Warfare 3 (seems interesting)
º SoulCalibur V (yup, I still like fighting games, if released for PC I might go for it)
º Nintendo Wii U (skipped current generation consoles, I might consider the Wii U)
º Aliens: Colonial Marines (could be good, seems interesting enough so far)
º Halo: CEA (Anniversary version, HD remake of CE, hopefully for PC)
º Halo 4 (not surprised by its announcement, still, could be good, time will tell)
º John Carmak interview (should enlighten a lot of gamers out there)
º Prey 2 (game-play footage seems fun, CGI trailer was gorgeous)
º Tomb Raider franchise reboot (looks good to me, I'd buy it if released for PC)
And that's about it I think. To be honest I was really expecting to see some sort of announcements for the following, but didn't make it (if I just missed something mentioned about them though please let me know):
º Borderlands 2 (nothing, oh well)
º New STALKER game (nothing, meh, perhaps later this year)
º Total War game (I keep dreaming for Rome II)
º That new ARPG game old IronLore peeps are working on (can't recall the name)
º Crysis 3 (I was honestly surprised not to see anything about that, perhaps next year)
º Dragon Age 3 (was expecting an "official" announcement, Twitter is hardly convincing)
º Wii U's hardware specifications (anything about that?)
º War for Cybertron 2 (wasn't there supposed to be a sequel for that one?)
º New Torchlight 2 media/updates/status (anything new about that one?)
I might be forgetting a few things that disappointed me by their absence but it's alright I can live with that (or rather, without). I do notice however that in general E3 is more... erm, shall I use the darn word even for that, stream-lined, in comparison to how "bigger" it was a couple of years ago.
But I also remember that many developers did somewhat mutually agreed some years ago that E3 was too demanding, and that it was actually slowing down some game's development process since the developers attending to it (or at least the "big" ones) had to cut a game's development time to create E3-exclusive/E3-only demonstrations, and it kinda pissed the industry off in general, so they decided that for future E3 expos everything should be focused on what matters the most (I.E actual in-game game-play footage rather than making E3 exclusive stuff, at least generally speaking).
This year's E3 along with the expos of the past years do feel "smaller", I guess, perhaps as a result to that agreement from years ago (did it ever happen or am I just stating old news that never really did make much difference over the years and only made some fuss back then?).