Vin: I guess right about now you kinda wish you'd given your crops to Calvera, huh?
Hilario: Yes. And no. Both at the same time. Yes, when I think of what he might do. No, when I remember the feeling in my chest this morning as I saw him running away — from us. That's a feeling worth dying for. Have you ever... felt something like that?
Vin: Not for a long, long time. I, uh, I envy you.
The Magnificent Seven contains examples of the following tropes:
Accidental Aiming Skills: Britt kills a bandit fleeing on horseback with a single rifle shot from a moderate distance. When Chico calls it the best shot he's ever seen, Britt calls it the worst, because he had aimed for the horse.
This also subverts the trope: Britt had aimed at the horse because he wanted to take one of the bandits alive and question him about the strength of the bandit group.
Action Film, Quiet Drama Scene: Vin and Hilario have the page quote conversation in the middle of a firefight. The scene where Lee wakes from a nightmare and talks about losing his nerve counts, too.
All-Star Cast: This film has one of the coolest casts in the history of cinema: Yul Brynner, Steve McQueen, Charles Bronson, Robert Vaughn, James Coburn, Brad Dexter, and Horst Buchholz play the Seven. Brynner was already a star (known for The Ten Commandments and The King and I, the latter of which won him an Oscar), and four of the others went on to become A-list stars thanks (in part) to this movie, and while Horst Bucholz didn't become an A-list star in America, he did become exceptionally popular in European cinema — which leaves poor Brad Dexter as the only member of the main cast who didn't become a big star in some way.
Don't forget Eli Wallach, who became a familiar face in many successful movies later on, including his most recognizable role in The Good, the Bad and the Ugly.
Batman Cold Open: The film does a Western variation (escorting a dead Indian to a cemetery whilst under fire) of the Batman Cold Open from Kurosawa's original. It both establishes Chris and Vin's creds as awesome gunslingers and solidifies their respect for each other.
The film lifted this directly from Seven Samurai: the seventh samurai tries hard to become a samurai and constantly boasts and showing off — before he tearfully admits that he came from a family of selfish farmers.
Call to Agriculture: Chico, in spite of explicitly stating in an earlier scene that he had no intention of settling down, does exactly this at the end.
Catapult Nightmare: Lee scrambles across the room in a panic when he awakens from a nightmare.
The film plays it straight in some instances: several characters make shots on the run, shoot guns out of hands, and make otherwise improbable shots. It doesn't do this as badly as other Westerns from the same era, though.
The film averts this, too: Britt — acknowledged as one of the best gunmen of the group — takes several seconds to line up a rifle shot from a moderate distance, and he still claims to have missed his intended target (see Accidental Aiming Skills above).
Redemption Equals Death: Lee, who had struggled with cowardice throughout the whole movie, dies five seconds after he saves a group of villagers. Harry dies when he saves a cornered Chris from certain death.