Microsoft fans will say Micosoft,Nintendo fans will say Nintendo,Sony fans will say sony.
I'm not fans of Microsoft or Nintendo first party games so i will say sony

you can't deny the absolute truth that Imaginedvl said though.   augen gave a great example of it in practise too.  the gap in tastes between nintendo fans is pretty big compared to MSony fans.   nintendo fans can enjoy things like toad's treasure tracker or splatoon or mario party or yoshi's world of yarn and completely dismiss things like TLoU and the order and bloodborne ect. and so forth.  i'll be the same but opposite. 

fair or not it is the reality that each person declares the winner with a massive bias for personal tastes in gaming.

*Remembers Twilight Princess reveal; goosebumps*

If things are going the way they are then Nintendo would be last. They'll just bring out their typical 1st party games ie. Zelda, Metroid, Star Fox etc..

Sony seems to have the momentum of bringing new outstanding games, but I wont rule out MS as they have Halo 5 and they're big enough to make anything happen. But ill guess Sony will win.

These two statements contridict each other.

/englishprof

I'm mainly a Nintendo fan, so by default Nintendo will win E3 2015 regardless of what Sony and MS will show! Am I doing it right?

FIxed. Sorry its hard to proofread my work when im at work.  

The thing is Nintendo has great, but typically the same, first party.  Splatoon is a nice change but 1 new IP isnt enough.  MS will have their first party and you can bet that they'll have alot of their own new exclusives plus third party along the way.  

I haven't been blown away by Nintendo in a long time as everything they do doesn't seem as fresh anymore (gamewise).  I always like to hope that they'll surprise us all and show us tons of completely new stuff but it still hasnt happened.  That's just how i feel.

Sony's legitimate possibilities have more weight IMO than the others.
God of War, GT7, Horizon, Media Molecule's New IP, that's without going crazy on the expectations, like The Last Guardian and Agent making a reappearance, which they very well could do.

Uncharted 4 will no doubt have new gameplay and probably it's release date.
Sony London could have a new Getaway game.
Sony Bend has a game, rumored to be an open world horror title.
Sly Cooper has a movie coming out next year, so there could be a game for that.

Resistance was recently trademarked again, Guerrilla Cambridge could be working on that or a new Killzone.
Maybe Motorstorm, a Wipeout or even an Exclusive Ridge Racer.
All possible for PS4.

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Microsoft will probably have Halo 5, Scalebound, Crackdown and Phantom Dust gameplay, Forza 6, maybe Gears of War 4 too.
Extremes could be a Conker, maybe Banjo, Battletoads.
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Nintendo will have Starfox and Zelda gameplay.
Maybe a new Metroid, Fire Emblem, F-Zero
Extremes could be a new core 3D Mario game, a Pokemon Open World game.

All parties can have plenty of surprises.

It's going to be what always happens. Sony fans will think Sony won, Nintendo fans will think Nintendo won, and microsoft will be underwhelming. That's what always happens.

QFMFT!!!!

On that note, I believe Sony will win it. And I'm sure I have very good reasons but the Xbox and Nintendo people will obviously not agree with me so what's the point? 

Just look at how treehouse is now supposedly the best thing since sliced bread, conveniently ignoring that in addition to having a proper live unmanicured conference, Sony also had its own treehouse equivalent on YouTube too for the duration of E3. Fans right?