When it comes to the Rocky series, most fans of the franchise would argue that the first Rocky film is the best. Although, extensively about boxing, the reason the film resonates with a far wider audience than just boxing fans, is because the film is not really about boxing at all. Yes, Rocky is a boxer, inspired by real-life fighter, Chuck Wepner. Yes, Apollo Creed is based on Muhammad Ali. And yes, Ali had a famous fight with Chuck Wepner; where Ali was controversially knocked down by the massive underdog, and this was the inspiration for the first Rocky film. But if any fighter took half the punishment Rocky Balboa takes in the film, the fight would be stopped, hopefully. For this reason, some hardcore boxing fans, actually dislike the series. The secret behind the success of the Rocky films is that they use boxing as a metaphor for the challenges all people face at some point in their lives, and so, anybody can relate to them.
In the first film, Rocky has just turned 30-years old. In the Seventies, this was considered the end of a fighter's prime, an age where fighters should be thinking about making enough money to retire before their skills deteriorate and they risk serious life-changing injury or worse. But Rocky, despite being considered a talented fighter, has underachieved at the only thing he ever showed promise in. Instead of fighting for championships, he is fighting "bums" in small club shows and is forced to make his living as a debt collector for the local loan shark.
Seemingly with no family, the nearest thing Rocky has to a father figure is his trainer, Mickey; who is introduced in a scene where Rocky discovers the locker he has used for the past six years has been given away by his mentor to a younger fighter. Rocky is an underachiever, a boxing tragedy, who is seemingly too old to ever fully realize his potential now. A point that is hammered into the heads of the audience in a confrontation between Rocky and his father figure.
Rocky asks: "I've been coming here for six years, and for six years you've been sticking it to me. I wanna know how come?"
Mickey responds: "Okay, I'm gonna tell ya! Cause you had the talent to become a good fighter, but instead of that, you become a leg breaker to some cheap, second-rate loan shark!"