Today’s little known opening idea is 2.f4 against the French. It leads to closed positions in which White has more space but there’s very little theory. Personally I like this kind of game which is similar to my 2.d3 against the Sicilian. But it’s probably not for everyone.
The following highly highly creative game was played by Vadim Zviaginsev and features the positional sacrifice of the exchange and a pawn. The computers will count the pieces and say it isn’t enough, but White has wonderful control of the dark squares.