Mithrandir said:
how matter-of-fact Vader is in everything he does, with a very defined characteristic of coldness, tranquility, lack of enthusiasm and even elegance.
Exactly. I always loved how in ESB he is the second to draw the sword... and the "good guy" is the one attacking. ;)
An example I recall from some mediocre EU pulp:
SomeBadGuy: Yes, Sir!
Vader turns around: "yes, My Lord!"
Sounds very unvaderish to me. Like some weakling whining "I demand respect!".