Quote Originally Posted by MrViggy
True, but the words and manner in which he speaks them suggest that the power has gone to his head. It also seems to me that his idea of "peace and justice" is really a universe with no war. Just because there is no war does not mean that the universe is at peace. And, that's what we see in Episode 4, right? The universe is not at peace, but living in fear of the empire.
No, the empire is not at peace, because the strongest supporters of the Republic, formerly led by his wife, turned against the new galactic order.

Earlier you said
One other interesting observation I found was the difference between Anakin/Vader in the first 3 episodes, and Vader in the last 3 episodes. In the first three (well, 2 and 3 really), Anakin/Vader is this arrogant, angry person. In the last three, it's almost as if Vader has come to peace with himself. He's no longer really arrogant (just don't make him angry), and he doesn't seem as angry all the time.
That is a very good remark. Probably all the passion died along with Padme and in time he became cold and was no longer hasty.