Some SF French restaurants I like:
Chez Maman in Hayes Valley. They have a pretty good burger that is not exactly French, and also a good moules frites and a blanquette de veau which I think is very French.
La Société in SoMa
Absinthe also in Hayes Valley is also quite good.
And also Monsieur Benjamin in Hayes Valley, but it is closing this month.
I also like L’Ardoise in the Castro - very good coq au vin, escargots en croute, and rack of lamb.