The one who shows us the most interesting games for the coming year

That's kind of subjective, don't you think?

Exactly. That's why all of these polls tend to be pretty biased and don't actually mean a thing. The only people who "win" E3 are investors, and the gamers. So it doesn't need a winner, because everyone should be happy after the week is over.

I want Gamers to win... But I'm not sure what is the best way for this...

M$. Though they could destroy it all too easy. I seriously doubt that they will, they're doing well and should snatch any momentum the billions of dollars monster can get its hands on.

Winner: Us
Reason: New consoles

As I recall from last year whichever company has unreleased hardware to show off is the winner, so it's between MS and Sony.

I think the general consensus will be that there is no consensus on this issue.  All three have strong reasons to have good shows for their respective bases.

For me personally the winner will be whoever focuses on games the most.  If I watch a conference by anyone and they drone on and on about extraneous features and services that will be the company I have the least interest in.  If a company shows variety of games and puts those out first as reason to buyt heir system, they will have "won" my interest as likely adopter of their system. If all three do this, well...I have a tough decision and some saving to do this year.

Exactly. Never again I will expect anything good from E3, regardless which company.