Positions in which the kings are castled on opposite sides often feature a violent race of attacks. Alexander Kotov wrote a chapter on this subject in the book he wrote together with Paul Keres, The Art of the Middle Game. He described how he used to practice playing such positions as a boy and later formulated a series of rules. One of them was that success in such attacks usually goes to the player who manages to force his opponent on the defensive.
Here’s a nice example of opposite side castling from the Baku Olympiad. Mato Jelic provides some great commentary and his other Youtube videos are worth checking out: