I haven't seen everything yet. I watched some of the EA and Sony Press Conferences, and I watched Nintendo's Digital Event. Here's some of my notes:
As has been the trend, there are a lot of games that are blending together, and they seem more focused on cinematic presentation and a rigid style of gameplay. Stuff like The Order and Bloodborne have some interesting ideas behind them as concepts, but not necessarily as games. While it's not my genre, I think Battlefield: Hardline is going to be a huge success for FPS fans.
Really surprised that Devil's Third is coming to Wii U exclusively, and also that Bayonetta 1 will be released for Wii U, as well.
I think Yoshi's Wooly World is shaping up to be a much better game than I ever expected--engaging visuals and some really tight gameplay concepts that look more balanced than some previous Yoshi outings. Captain Toad was a surprise--I thought it was Galaxy 3--and it might be the most complete 3D game I've seen presented so far. It looks like a mix of Super Mario Bros 2, Mario Galaxy, Mario 3D World, and Luigi's Mansion. Just not totally sure how I feel about a Toad-based game yet. I've found the Dynasty Warriors series repetitive and a one-trick pony in the past; Hyrule Warriors looks like it has a little more variety and some extra fan appeal for Nintendo fans, but I'm not sure it can hold my interest.
Zelda: Wii U...I really need to see more, and thought they'd show some gameplay. I love the idea of an open world, but I have mixed feelings about the art direction of certain elements, especially the enemy shown. I did like the new Link's hair, which was more classic with the long sideburns, but now I'm hearing that might be Zelda or some other characters, and not Link. I've felt burned by the 3D Zeldas post-N64 era, and unfortunately, the little bit shown wasn't enough to give me 100% confidence. The visual effects, such as lighting and physics, are clearly right where they need to be, though. Worried we're seeing too much technology slip into the series with that "laser arrow" thing. I'm worried Zelda is mixing too many aesthetics.
Mario Maker is intriguing, but I've seen these types of level-editor games have lackluster results before. Miyamoto's secret projects of Star Fox, Giant Robot, and Guard didn't overwhelm me from what little I saw, but I'm happy to see that these sorts of things are being done. Splatoon is a really neat game that brings to mind Mario Sunshine and Nickelodeon; but it requires multiplayer, and I don't usually get into those kinds of games. I'm excited that Megaman X3 for SNES, Megaman 7, and Demon's Crest are all coming to Wii U's Virtual Console. Xenoblade Chronicles looks nice, but that kind of game isn't too appealing to me. The new Pokemon remixes look good, but it's a series that may be overplayed in terms of releases.
That's my takeaway so far. I'd really like to hear Castlevania: Bloodlines and Contra: Hard Corps are coming to Wii U. That would put things over the top.
Honestly, I haven't had that "totally blown away" moment from E3.