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?
In fact, Eli Wallach never saw Calvera as a villain, just a guy trying to make a living.
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 and Katsushiro/Kikuchiyo- All three are the eager outcasts of the group. Chico is rougher around the edges than Katsushiro, yet doesn't completely wear his heart on his sleeve like Kikuchiyo.
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.
A comparison with a later counterpart: Calvera and Hopper. Both are bullying, smug egotistical bandits. However, whereas the grasshoppers are shown to have everything they need inside their sombrero, and Hopper is a Control Freak whose entire motive is about keeping the ants in line, Calvera and his men are in a much more desperate situation where they need to steal food from the farmers in order to survive. Furthermore, both are philosophical villains. In contrast to the two, we never see Calvera abuse his own men, at least not physically.
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 sleeping in stables because inn-keepers are afraid their place will be shot up because of him.
Estrogen Brigade: Let's see: we have the very handsome Yul Brynner, Steve McQueen, pretty boy Horst Bucholz, James Coburn, and the charismatic, unconventionally handsome Eli Wallach. Yes, these are reasons enough.
Fountain of Memes: 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.
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.
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 he could sit up and talk, he'd second the motion! Now that's as unanimous as you can get."
Stop Helping Me!: Bernardo's Instant Fanclub follows him everywhere and tries to help him in any way; they get him killed in the final battle when they distract him during a gunfight.
Earlier, Calvera is talking to Sotero about how they tried to rob a church, only to find nothing worth taking. A bandit watching nearby helpfully adds that they took what was there anyway. Calvera doesn't appreciate the remark very well.
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.
Harry's was one of the worst. He initially abandons the team fearing the odds are against them. He comes rushing in and saves Chris, then gets shot for his troubles.
Harry: I'll be damned. (dies)
Chris: Maybe you won't be.
Poor O'Reilly, ends up getting him killed protecting his Instant Fan Club instead of concentrating on the fight. And the poor kids get a front row seat.
Village Boy: We didn't mean to do it! We didn't mean to do it!
Poor Lee, while little of his personality is explored. His dying after getting his nerve back and saving a lot of lives in the climactic battle and ends with him killed right afterward. His rescue led to the villagers taking part in the final battle.
Britt, it's not so much his death (though that's still hard to watch). It's when Chris finds his knife after the battles over. He picks it up, then gets a mournful look on his face.
Surprisingly, Calvera's death, which, in a role reversal, somewhat mirrors Kikuchiyo's. His shock and confusion after being shot by Chris makes you feel a little sorry for him.