never
I recommend you to try this https://chessmood.com/course/french-defence
Done. Very nice one!
Karpov
I always do
I do, but I'm sure it disturbs me
Scotch, Sicilian
Scotch for white Najdorf for black
I prefer only e4 and I recommend you to play e4 for white as you are a tactical and I guess an attacking player. c5 for black against e4, and Benko against d4 https://chessmood.com/course/benko-gambit
my ratings are the same