Alternative Character Interpretation: Calvera telling his comrades to forget about their fellow fallen bandits. Was he really that careless about his own men, or did the loss hurt enough that he was turning his attention to the future of the ones that were still alive? Was he hiding his own sadness and trying to be optimistic?
In fact, Eli Wallach never saw Calvera as a villain, just a guy trying to make a living.
Awesome Music: Elmer Bernstein's score, particularly the unforgettable main title theme. Eli Wallach (who portrayed the bandit leader Calvera) once remarked that if he'd have heard Elmer's music during filming, he'd have ridden his horse better.
Chris and Kambei - Both are the cerebral leader and the first to help the farmers in need. However, Chris is more welcoming towards Chico and not so scornful of his class, although skeptical of his abilities as a fighter.
Vin and Shichiroji - Both are the loyal second-in-command who are one of the only three to survive at the end. Also, like Gorobei, he is the second one to join.
Chico is a Composite Character of Katsushiro and Kikuchiyo - the eager outsiders. Like Katsushiro, he is young and inexperienced and forms a romance with one of the village girls; like Kikuchiyo, he makes himself a bit obnoxious in his eagerness and is looked down on as a wannabe by most of the more seasoned fighters, but turns out to have a better understanding of how to deal with the villagers than they do (since he comes from the same kind of background) and proves himself a valuable member of the team.
Bernardo and Heihachi - Both are first seen chopping wood for a living. Whereas Heihachi is cheerful and upbeat, Bernardo is serious and observant.
Britt and Kyuzo - Both are the serious, silent, introverted types who are better with a blade than with a bullet. However, Britt is not quite as conservative and uptight as Kyuzo is.
Petra and Shino. Both characters are disguised as boys to be protected from the group of wandering strangers, yet have a relationship with the movie's youngest fighter once their gender is revealed. Unlike Shino, Petra is allowed to stay with Chico in the end.
Deconstruction: Lee, of the gunslinger archetype. His sharp eye, fast hands, and take-no-crap attitude has given him... a life of jumping at every shadow for fear of the next person to try to take his title, and paying exorbitant amounts of money to sleep in stables and storehouses because inn-keepers are afraid their place will be shot up if they let him have a room.
Harsher in Hindsight: Eli Wallach (Calvera) outlived all but one (Robert Vaughn) of the actors who played the Seven.
Love to Hate: Calvera. He's ruthless and cruel, but he's so much fun to watch! Even those who don't like the film enjoy Wallach's glorious scenery-chewing.
Memetic Mutation: There are many memetic lines from the film, and many of them occur in a five-minute sequence during the first confrontation between Calvera's bandits and the Seven. Outside of that part, there's Britt's famous "I was aiming for the horse!" and Lee's "Enemies: None. ... alive." speech.
Narm: The villagers' acting as they discuss what to do in the beginning is...admittedly kinda wooden.
One-Scene Wonder: The travelling clothes salesman who's filled with quips about the situation involving "Old Sam". He's every bit as quotable as most of the Seven:
"Now how do you like that? I want him buried—you want him buried—and if he could sit up and talk, he'd second the motion! Now that's as unanimous as you can get."
Surprisingly Similar Characters: Lee and Kikuchiyo are polar opposites in personality yet have a surprising number of things in common. Both are somewhat mysterious and have done something, or do something that they regret and are in or go through a Heroic B.S.O.D. during the film; Lee has made so many enemies that he can barely show his face, while Kikuchiyo's jealousy of Kyuzo leads to abandoning his contingent of farmers, leading to Yohei's and Gorobei's deaths. Both suffer a Redemption Equals Death in the Final Battle whilst rescuing a group of farmers held up by bandits in a farmhouse.
Values Dissonance: Race issues are deliberately addressed at times, particularly how white people are treated by authorities compared to Mexicans.
Calvera: You'll do much better on the other side of the border. There you can steal cattle, hold up trains... all you have to face is sheriff, marshall. Once I rob a bank in Texas; your government get after me with a whole army. Whole army! One little bank. Is clear, the meaning: in Texas, only Texans can rob banks.
Values Resonance: The men opposing Old Sam being buried in the local cemetery are called out as bigots by pretty much everyone, and only make progress because the civilians are terrified of them. The salesman who pays for a stranger's funeral out of his own pocket stands out.