I have been a long time French player myself. While I learned how to play the game in 1983, I read my first chess book, "Winning Chess Tactics", in 1995. I knew nothing about openings, and was playing games, and asked if the opening I was playing as Black had a name (I tried different ideas and got comfortable with this one in particular). I was informed it was called the French Defense. Read "Winning With the French" by Wolfgang Uhlmann in 1996, probably own about 20 French books now, and while I have played almost every normal opening that exists, the French is still my primary weapon (with the Petroff as my secondary weapon) against 1.e4.
I have been writing for the Charlotte Chess Center blog, and one of the things I have written was a 7 part French Repertoire in 2017 (August thru November) and since then, while I have also written other random topics, I have been writing "The French Connection", which is 18 articles deep now.
Check out the following:
French Repertoire (Part 1 - The links to the rest are at the bottom):
https://charlottechesscenter.blogspot.com/2017/08/opening-preparation-french-defense.html
(I encourage you not to just pigeon-hole yourself to the repertoire, and many of the articles in The French Connection are other lines not covered here in the repertoire, but some also are. Having a diverse understanding of the variations is crucial and there really aren't a lot to know in the French - Exchange, Advance, Tarrasch (Open - 3...c5, and Closed - 3...Nf6), and 3.Nc3 (Classical, Winawer, MacCutcheon, Burn, Rubinstein), and the King's Indian Attack. That's really it, unlike the Sicilian where there are tons of lines White can play!)
The French Connection (You can navigate by month looking for the other 17 articles - same title to each except volume number).
https://charlottechesscenter.blogspot.com/2018/03/the-french-connection-volume-1.html
Going through Winawer games, particularly the wild games that result from the 7. Qg4 move, gets me familiar with positions that result from that particular opening variation, but with little else, it seems. On the other hand, when I study, say, a Tarrasch QGD game, it leads to familiarity with pawn positions that can arise from any number of openings, and educates me not only as to that opening but also how to steer games arising from any number of different openings into pawn structures that I have some idea how to play with (or against). My question is -- does studying the Fench improve your chess generally, or just allow you to outplay opponents in particular variations you're now familiar with?
I'm interested in accomplished, experienced players' opinions, please don't fill this thread with vapid, uneducated, and downright wrong opinions that start with "The French is a passive opening, blablabla"
Thanks for your thoughts.