3.Nc3, followed by 3.e5 a close second.
Here's the catch. The French is no different than the Sicilian. You get players that want a Winawer because it is "interesting", which motivates them to study it, and that is all they study, just like the Sicilian Dragon, King's Indian Mar Del Plata, or Marshall Gambit Accepted.
The thing is, if you are disciplined enough to spend the time to study the other lines that may be somewhat "boring", you will realize how easy they are to defend if you know what you are doing.
Therefore, while the Exchange may be a little more "annoying", it creates little to no issues for Black at all if Black knows what he is doing. In fact, I foam at the mouth in joy if White is stupid enough to play 3.exd5, and cringe if I face 3.Nc3.
It is just like the Sicilian Defense. An immature moron will spend all his time on the Poisoned Pawn Najdorf, and little to no time on the Alapin or the Closed (which I play as White myself) or the Rossolimo. That said, there is a reason I don't play the Sicilian any more. It's NOT because of the lame Alapin, or the Smith-Moron Gambit (More appropriate than Smith-Morra Gambit). It's because of times I've gotten mauled in the Najdorf or Taimanov or other Open Sicilians!
At the same time, you have to play what you are comfortable with amongst those that can actually give Black issues. 3.Nc3 and 3.e5, along with the King's Indian Attack, tend to give Black far more issues than the Exchange (3...exd5!) or Tarrasch (3...c5!). If you prefer a slower, space-gaining, more positional game, play 3.e5. If you are ready to calculate long forcing lines, play 3.Nc3.
Hi all.
Q: What, according to your experience, is the hardest thing White is able to play against the French Defense?