Mithrandir said:
You just need to see how Kylo Ren stomps his feet in the ground when he activates his sabre in TFA's first teaser; it just screams "whooaaaa, EPIC", and compare it with how matter-of-fact Vader is in everything he does, with a very defined characteristic of coldness, tranquility, unenthusiasm and even elegance.
The foot stomping thing could play into his his personality just like Vader's movements plays into his.