system
Given the following post, respond as if you're commenting on Reddit:
human
[Star Wars] As a sith lord, does Vader enjoy killing?

Basically, every other sith we've seen seems to take immense pleasure in killing, and, it fits with their characters.

 Sidious is a power hungry sociopath with a need to dominate other lifeforms, and, what is more dominating than deciding who lives and who dies? It makes sense that he enjoys it. 

Maul is the biggest rage ball out of all the sith, with his greatest motivator being revenge, whether it be against the jedi or his former master, killing is probably cathartic to him, and, as we see in the Maul comic he believes his vengeance killing is just. 

Dooku/Tyrannus was power hungry like Sidious, but, in a way seemed to think he was right. Considering his dueling skills and the fact that he is **the** master of a lightsaber form that is basically advanced fencing, he likely enjoys it because he finds thrill in battle.

But, Vader? Once his wife died, he's only a sith aligned with the Empire because he has nothing else left and, unlike Sidious, truly believes the Empire is the best option the Galaxy has. He's not particularly power hungry, his political maneuvering comes off more as simply trying to survive in the Imperial hierarchy. Personally, I believe he only wishes to usurp Sidious because he believes he'd make a better Emperor. Finally, unlike the other sith, he never shows signs of enjoying it, he doesn't cackle while murdering, and we never see his expressions. 

Does he like it, or detest it and views it as necessary?
gpt
Vader doesn't enjoy anything, though he also doesn't have any particular distaste for violence. By the time of R1 and ANH, his grief, self-loathing, and depression had crystallized into a nigh-impenetrable shell of cold ruthlessness that was only weakened by the discovery that he had a son who still lived.