Kubrick has, and always will be regarded as one of the greatest directors in cinematic history. From the tragic, resolute Paths of Glory to the sexy, involving Eyes Wide Shut, Kubrick has always included one important theme into all his films. He always took protagonists, and created a sardonic anti-hero out of their modern, if at times caricatured personality. In Barry Lyndon, we have a poor farmboy who uncannily transcends into a royal position, facing love, grief, and loss, but Kubrick also made him human, an easily temptable, weak character when he was faced with love or power. A human flaw that can easily distinguish a fair amount of people. In A Clockwork Orange, Alex was an anomalous, at times sympathetical character, but also a pseudo-anarchist that never indulged in moralistic apathy. His flaw was that he longed for adventure, for exhilaration out of life, and when he couldn't get that, he turned to criminal behavior to relief his eccentric desires.
He was an expert in the field of human nature, in exploiting the weaknesses of his protagonists. Despite his characters sometimes being unlikable and wretched beings, they were always relatable in a sense, how we shared the same weaknesses, and made human choices, and held similar desires. Kubrick never created interesting characters without logical or humane reasoning, without realizing the plausibilities of his characters personalities, or understanding their living entity, placing them in society, understanding their intentions and vulnerabilities. He never fails to deliver three-dimensional characters, those who hold complex and simultaneously natural qualities, and through genuine emotion, relief, disposition, and revelation, he embeds a little bit of life into his films.