Guardians of the Galaxy

Rocket: "Why would you want to save the galaxy?"
Peter: "Because I'm one of the idiots who lives in it!"

Rocket: "Fine, but I can't promise when all of this is over I'm not going to kill every last one of you jerks."
Peter: "See, this is exactly why none of you have any friends!"

"I am going to die surrounded by the biggest idiots in the galaxy."

Gamora: "I'm a warrior, an assassin. I don't dance."
Peter: "Really? Well, on my planet, we have a legend about people like you. It's called Footloose. And in it, a great hero, named Kevin Bacon, teaches an entire city full of people with sticks up their butts that, dancing, well, is the greatest thing there is."
Gamora: "... who put the sticks up their butts?"

Rocket: [talking about Drax] "His people are completely literal. Metaphors go over his head."
Drax: "NOTHING goes over my head...! My reflexes are too fast, I would catch it."

"I am Groot."

Drax: "I can barely see."
[Groot is releasing glowing spores from his body to light up the area]
Drax: "Where did you learn to do that?"
Peter: "I'm pretty sure the answer is: 'I am Groot'."

Korath the Pursuer: "Star-Lord!"
Peter Quill: "Finally!"