I know this is a hard one, but I’m going to go with....

“Give me a fat beat to beat my buddy’s a$$ to.”

~Tony Stark, Iron Man 2.

In context it was, and still is, hilarious to me.

"Its noobmaster69"

“As far as I’m concerned, that is America’s ass”

I am ironman

I can do this all day

I never freeze

I am inevitable

We are Groot

I am inevitable

“He's not a dude, you are a dude. He is a MAN. A handsome, muscular man...it’s like a pirate had a baby with an angel.”

“I understood that reference.”

“He may have been your father, boy, but he wasn’t your daddy.”

“So, Back to the Future is a bunch of bulls***?”

"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. 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."

"You have my respect, Stark. When I'm done, half of humanity will still be alive. I hope they remember you."

And

''I am Iron-Man''

"Up general this is no place to die"

*Dies*

“I’m Mary Poppins ya’ll!”

I must say this does put a smile on my face

“He may have been your father, boy, but he wasn’t your daddy.”

“Dread it, run from it, destiny arrives all the same. And now, it's here. Or should I say...I am.”

"Don't waste it... don't waste your life, Stark."

-Yinsen

You're making... Me... Beat up... Grass!

Too many to choose from. Right now, I'd say "I'm Iron Man".

You could not live with your own failure. Where did that bring you? Back to me.

There are too many too mention, so I'll just drop some of my favourites:

1. "Bury me with my ancestors who jumped off ships. Because they knew that death was better than bondage."
2. "I Am Iron Man."
3. "You should've aimed for the head."

1) “Whatever It Takes” - Black Widow

2) “You Will” -Wanda

There are so many to chose from but so I'll chose some of the ones that I can remember right now.

1. You could not live with your own failure. Where did that bring you? Back to me. -Thanos

2. Nah. Just bury me in the ocean with my ancestors who jumped from ships, 'cause they knew death was better than bondage. Killmonger

3. Dr. Stephen Strange: Ok, let me ask you this one time: What master do you serve?

Peter Quill: Oh, what master do I serve? What am I supposed to say, Jesus?

4. We're the Guardians of the galaxy bitch- Peter Quill to Ronan

Don't know if all of these are accurate quotes

Ultron:

"I think a lot about meteors. The purity of them. Boom. The end. World set clean for the new man to rebuild."

"I'm not one of his puppets. Do I look like Iron Man?"

"I was meant to be new, I was meant to be beautiful. People would look up to the sky and see hope, see mercy. And now they will see only harm because of you."

Ego:

"You're a god. What greater meaning may life possibly have to offer?"

"My life, my love, my lady is the sea. Peter, this is the sea."

Thanos:

"Dread it. Run from it. Destiny still arrives. And now it's here or should I say... I am."

"No resurrections this time."

"All that... for a drop of blood."

"Thank you daughter, I may have treated you too harshly."

"You couldn't live with your own failure. Where did it bring you? Back to me."

Thor:

whole talk with Rocket

Iron Man:

"I am Iron Man."

honorable mention:

He's not a dude. You're a dude. This is... this is a man. Handsome, muscular man.

Thor: I'll never be a wiser king than you, or a better father. I have much to learn, I know that now....... Someday perhaps, I shall make you proud.

Iron Man: I am Iron Man.

Korg: Hey man, I’m Korg, this is Meik, we’re gonna get on that Spaceship and get the hell outta here, wanna come?

Thanos: I am inevitable.

Valkyrie: The Devil's Anus?????

Many more but these are the ones that come at my head right away.

Reality is often disappointing.

"Bury me with my ancestors who jumped off ships. Because they knew that death was better than bondage."

The only thing that I’m not taking seriously BOI is you

“You could not accept your failure, and where did it bring you? Right back to me.”

- Thanos

No wait my favorite line is actually: "Nothing, I'm just a kid from Brooklyn"

"I'm Iron Man" changed not only the MCU, but our world as well.

-

-

"Hi little monkey Fitz" is pretty high on the list right now.

"Dread it, run from it, but destiny arrives all the same"

"Fun isn't something one considers when balancing the universe, but this does put a smile on my face"

"Perfectly balanced, as all things should be"

There's a lot to choose from.

No one has said “avengers assemble”

Tony - I am iron man (original)

Tony - that up there ? That’s the endgame. How do we beat that? Cap - together. Tony - what if we lose? Cap - then we’ll do that together to.

Cap - you get hurt ? Hurt em back, you get killed? ... walk it off!

Cap - the price of freedom is high but it’s a price I’m willing to pay.

Thor - the gates of hell are filled with the screams of his victims!

Thor - you know I’m 1500 years old. I’ve killed twice and many enemies as that and every one of them would have rather seen me dead but none succeeded. I’m only alive because fate wants me alive. Thanos is just the latest in a long line of bastards and he will be the latest to feel my vengeance. Fate wills it so.

Thanos - I am inevitable

Thanos - and I will bathe! The starways in your blood

Thanos - Fun isn’t something one things about when balancing the universe but this... does put a smile on my face.

Thanos - Dread it, run from it destiny still arrives. Or should I say, I have.

I also love anything Anthony Hopkins said as Odin he was perfect for it outside of lack of action.

1. "There was an idea, called the Avengers Initiative. The idea was to bring together a group of remarkable people, see if they could become something more. See if they could work together when we needed them to fight the battles we never could."
2. "Dread it. Run from it. Destiny arrives all the same. And now, it's here. Or should I say, I am"
3. "Avengers Assemble !" or "I can do this all day"

“Dr. Banner! I think is is a good time for you to get angry.”

“That’s my secret, Captain.... I’m always angry.”

“Brother... for whatever I have done to wrong you, whatever I have done to lead you to do this, I am sorry. But these people have done nothing to you. They are innocents. Take my life, and know I will never return to Asgard.” *A New King by Patrick Doyle plays in the background*

Wilson Fisk's "Good Samaritan" speech, Ultron's "you are my meteor" line, Thanos: "Destiny arrives all the same", Black Panther: "I don't care."

Surprised it hasn't been mentioned yet, the entire conversation was amazing. Probably the best conversation of the entire MCU. The underlined one is my favourite line among this convo.

And who will stop me?

The Avengers. That's what we are calling ourselves. Earth's mightiest heroes type of thing. Takes a while for us to get any traction, I'll give you that.

Stalling me won't change anything. The chitauri will come.

No, Threatening.
Let's do a head count here. Your Brother, the demigod, a super soldier, a living legend who kind of lives up to the legend, a man with BREATHTAKING anger management issues, and 2 master assassins. And you big guy, have managed to piss off every single one of them.

That was the plan

Not very good plan. When they come, and they WILL, they come for you.

I have an Army

We have a hulk.

Uh? I thought the beast had wandered off?

You don't understand. There is no throne, no version of this were you come on top. Maybe, maybe your army comes and maybe it is too much for us, but then it is all on you. Because if we cannot protect the earth, we will Damn well sure Avenge it.

How will your friends have time for me when they're busy fighting you? (touches scepter, activates mind gem)

This usually works

Yeah, performance issues, not uncommon. One out of five (gets thrown out)

(armor follows)'

And there is one more person you have pissed off, his name was Phil. (repulsor blast)

I am Iron Man.

I can do this all day.

Destiny arrives all the same and now it's here. Or should I say... I'm.

I am Iron Man.

Tony's line right here is really funny, but it's also a great line for narrative reasons, as he is suffering his PTSD and feeling afraid of the future.

The hammer pulled you off?

"welcome to the frickin' guardians of the galaxy"

"I am iron man"

"I am inevitable"

"That up there,that's the endgame"

"We have a hulk"(avengers 1)

"Hear me and rejoice"

I do like this one but it's obviously not my favorite.

I know what it’s like to lose. To feel so desperately that you’re right, yet to fail nonetheless. Dread it. Run from it. Destiny still arrives. Or should I say, I have.'

Thanos

A small price to pay for salvation

Thanos

CW Arrow is a much better fighter than any of the Avengers. We tremble before him

Black Widow

I'm surprised nobody mentioned this one:

"Big man with a suit of armor, take that off, what are you?" "Genius, billionaire, playboy, philanthropist."

These are great, too:

"When did you become an expert in thermonuclear astrophysics?" "Last night."

"I'm in the middle of an interrogation and this moron is giving me everything."

And the whole dialogue between Loki and Nat.

Whedon is really good at them quips.