- “I find your lack of faith disturbing.” (Extremely calm and witty response to a very professional provocation from Motti. One of the best examples.)
- “I told you she would never consciously betray the rebellion.” (Even Tarkin gets upset by this point but Vader remains calm.)
- He remains surprisingly calm even after one of his wingman rams his TIE fighter at the end of ANH. Probably the most irritating moment for him in ANH and yet he does not loose his temper in the slightest.
- “You have failed me for the last time Admiral.” (This line is said in a very clam and cold manner. No sign of loosing his temper, even though Ozzel screwed up big time. The tonal stress on “last” is just a natural speech pattern since the word “last” should be stressed.)
- “Apology accepted, Captain Needa.” (Extremely calm and witty line, even though Needa screwed up big time. One of the best examples.)
- “Perhaps you are being treated unfairly?” (Calm and witty response to Lando irritating him.)
- “You are beaten. It is useless to resist.” (Even though Luke cuts his arm, he is completely clam just moments later.)
- He does not kill Piett at the end of ESB and just calmly looks around the space and walks away. His body gestures are evidently super clam in this scene, which is even a bit surprising.
- Pretty much the whole ROTJ is one big example (especially scenes with Luke).
- I will maintain that choking a guy for insulting you isn’t being calm. He’s angry at him. People can still make witty comments when they’re angry. Case in point, Rogue One and the Revenge of the Sith novelization when one of the Separatists he kills says “We were promised a handsome reward”, and he says “You don’t find me handsome?” (the novel contains many scenes that were filmed but cut from the film, so this was probably something that was also cut). I don’t think anybody can argue he wasn’t angry in that scene. There’s also the part in the Anakin & Obi-Wan comic in which he gets mad at some students who call him a slave to his emotions, and he says “Tell me, what emotions are you feeling right now?”
- Vader saw her lying from a mile away. It’s an “I told you so” moment from him. When you see something coming it doesn’t warrant an emotional response.
- Just because he’s not yelling doesn’t mean he isn’t angry. Anger can be pent up. Besides, what’s he going to do in that small cockpit? It’s not like he can do anything that wouldn’t endanger him and the ship.
It’s like how Anakin was clearly angry when he was holding his mother’s corpse.
4. No, he’s angry, it’s easily discernible from his tone. The way he says “He is as clumsy as he is stupid.” also betrays that.
Also, you can’t forget “Asteroids do not concern me Admiral, I want that ship! Not excuses!” and “NO Captain, THEY’RE ALIVE.” He sounds angry, irritated, almost desperate.
5. Again, you can make a witty comment while angry.
6. He has no reason to be angry at Lando yet. And I don’t know about you but I picked up some irritated vibes from the way he said that. And there’s no way you can tell me he’s completely calm when saying “I am altering the deal! Pray I don’t alter it any further.”
7. That was before Luke hit him. He has no reason to be angry at him yet. He knows he can’t because he will murder him if he does. And after Luke hits him he gets very angry at him. He sounds pretty angry when he says “Don’t make me destroy you.” He even said pretty much the same thing to Obi-Wan on Mustafar “Don’t make me kill you.”
The scene on Mustafar parallels the scene with Luke in ESB in multiple other ways too, like how he proposes to Padme to rule the galaxy with him.
EDIT: actually, Vader is pretty angry when he says that. He was literally swinging his lightsaber furiously, even slamming two walls, seconds earlier.
8. He doesn’t because he’s too busy being sad and hurt that Luke left him. That’s the beginning of his transition to the light.
9. The Vader in ROTJ is different. He is conflicted with the light side. The director even made a conscious choice to delete the scene in which he chokes a guy as a way to show he is transitioning to the light. When Luke refused to join him that had a huge impact on him, as also seen at the end of ESB. The new 2020 comics make it clear that he is not his usual self in that film.
You also flat out ignore how I said that Yoda and Obi-Wan outright says he’s an angry man consumed by emotions.
The person above me is correct, he is more calm, but he’s not completely calm.