I lived my entire life waitin' for this moment. I trained, I lied, I killed just to get here. I killed in America, Afghanistan, Iraq... I took life from my own brothers and sisters right here on this continent! And all this death just so I could kill you!

Y'all're sitting up here all comfortable. Must feel good. There's about two billion people around the world who look like us and their lives are a lot harder. Wakanda has the tools to liberate them all.

-Killmonger, obviously the best villain in the MCU

"That was dramatic. I'm sorry I know you mean well, you just didn't think it through. You want to protect the world but you don't want it to change. How can men see the future if it's not allowed to evolve? With these...these puppets. There's only one path to peace....The Avengers Extinction."

- Ultron

"No...how could you be worty? Your all killers"

-Ultron

"I'm a peace keeping program?...Created to help the Avengers"

-Ultron

"I remember saying alive and otherwise, that what we needed...was a suit of armor around the world, remember that? I'd say we lose...and you said we'd do that together to...Well guss what cap...we lost...and you weren't there"

-Tony Stank

"I got low....I didn't see an end so I put a bullet in my mouth and the other guy spit it out. So from then I worked on helping people, I was good, until you threw me back with this freak show and put everyone here at risk, you outta know my secret Agent Romanoff? You wanna know how I keep my cool?"

-Bruce Banner

"Ask Noah" - Ultron

It's a little comedic but...

"I am a god you dull creature! And I will not be bullied by a-"

"When you look into the eyes of a child you have raised, no mask in the world can hide that." Dreykov

"With you, an Avenger under my control, I can finally come out of the shadows using the only natural resource that the world has too much of. Girls." Dreykov

"You are the first thing, excuse me, person, that I ever wanted that walked away from me."

―Kilgrave

“I speak many languages.”

“How many?”

”All of them.”

"You embarrassed me! You embarrassed me in front of her!" - Kingpin

(Technically still a villain at this point since he only became a good guy after that meeting with Mobius):

Absolutely not! This is fine Asgardian leather!

Thanos

• I know what it's like to lose. To feel so desperately that you're right, yet to fail nonetheless. It's frightening, turns the legs to jelly. But I ask you, to what end? Dread it. Run from it. Destiny arrives all the same. And now, it's here. Or should I say...I AM

Killmonger

• Just bury me in the ocean, with my ancestors that jumped from the ships, because they knew death was better than bondage.

• How is never as important as why, right?

That first Killmonger quote about being buried at sea is so powerful. I remember the first time I saw the movie, I felt like someone had punched me in the gut.