A drum set in a left-handed configuration simply mirrors a standard right-handed setup. Your hi-hat goes on the right, the right cymbal on the left, and the bass drum on the left. As a summary: It can feel more natural for left-handed players to lead the hi-hat with their dominant hand.
Why do drummers Cross Hands?
One such example of this is how drummers cross their arms when they play the hi-hat. Why is this common practice? Drummers cross arms so they can use their dominant hand on the hi-hat, as cymbal rhythms tend to be the most physically demanding part of a groove.