Most aggressive? I dunno, the Scandinavian? The Latvian Gambit? The Danish Gambit? Alekhine's defense?
What is the most aggresive defence to 1.e4
richie_and_oprah what do you mean by ambitous and what sicilian opening. I think it would be nadjorf.

Of the theoretically accepted lines in modern superGM play I would venture a guess that the Sicilian is both the most popular and the most 'agressive' ... the french defense (irritatingly enough) has it's strong points too though.

To me, 'aggressive' means trying to force a win before one even equalizes as black, creating complications in that effort, regardless of theoretical status.
If that's the case how about a gambit?

Of the theoretically accepted lines in modern superGM play I would venture a guess that the Sicilian is both the most popular and the most 'agressive' ... the french defense (irritatingly enough) has it's strong points too though.
And that is one of its bonuses. People who don't play the French seem to find it really annoying to face.

Of the theoretically accepted lines in modern superGM play I would venture a guess that the Sicilian is both the most popular and the most 'agressive' ... the french defense (irritatingly enough) has it's strong points too though.
And that is one of its bonuses. People who don't play the French seem to find it really annoying to face.
Yeah I HATE facing the french!

People who don't play the French seem to find it really annoying to face.
The part I find 'annoying' is that in the philisophical world of chess theory, the mainline Winawer should be considered innacurate. Black could not be considered correct to exchange his good bishop for white's knight, simultaneously leaving white with a minor space advantage and a relatively solid center (not to mention play on the kingside)... yet, I've never scored worse against any other defense...

Of the theoretically accepted lines in modern superGM play I would venture a guess that the Sicilian is both the most popular and the most 'agressive' ... the french defense (irritatingly enough) has it's strong points too though.
And that is one of its bonuses. People who don't play the French seem to find it really annoying to face.
Yeah I HATE facing the french!
I have friends that basically refuse to play if I play the French. I tell them they are free to either resign, or STFU and play.

Interesting, because the French is sort of under cloud at highest levels with the 3.Nc3 lines currently proving tough slogging for Black as the Winawer has been giving White good games lately, the Chatard attack is still raging and the Classical gives white a long lasting, although slight, advantage.
Fortunately for me, I don't play at anywhere near the highest levels.

Interesting, because the French is sort of under cloud at highest levels with the 3.Nc3 lines currently proving tough slogging for Black as the Winawer has been giving White good games lately, the Chatard attack is still raging and the Classical gives white a long lasting, although slight, advantage.
Fortunately for me, I don't play at anywhere near the highest levels.
Yes, but your opponents should emulate those lines against you.
I would!
I am guessing you see a lot of 'advanced' and 'exchange' variations?
I'd say I get the Advance Variation about 80% of the time, the exchange about 3%, and the knights variation about 6%. I very rarely see the Tarrasch, the Charrard, the Alkehine's or the Winawer.

It is certainly one of the best and hardest to beat. And, one major reason I moved away from 1.e4 and into more flexible waters with 1.d4
But defense, by its nature, is not aggressive, is it? It is defensive, and the Caro exemplifies this as well as any true defense.
The only way one can consider it aggressive is in the same way that Miles' 1.e4 a6 was aggressive. I watched a youtube video of that game. Very funny.
What is the most aggressive defence against 1.e4