I have found a nice line as Black which gives excellent attacking chances and rapid development at the cost of a double pawn.
The line can be reached via the two-knights or classical mainline variations of the Caro-Kann and include playing Nf6, where it can be captured with a check.
An example would be 1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nf6 5. Nxf6+ exf6.
This line is completely playable, and Stockfish also considers it OK.
Statistics of master games indicate, that White scores 10% more wins than in the mainline (lichess database), so it might be a bit risky (?), but I find it very enjoyable as Black.
The opponent gets a center pawn majority, but the doubled f pawn also has benefits, as it adds extra protection to the king and can potentially later be used as a battering ram if the opponent also castles kingside.
I find this variation easier to play as Black, whereas I struggle to find plans in the traditional mainline and tend to get outplayed positionally.