Masters of the Universe (Mattel, 1982–1987)

Masters of the Universe wasn't just a toy line; it was a childhood rite of passage cloaked in plastic. Imagine explaining to someone why your muscled-up He-Man figure, who basically wore a harness and purple pants, was the epitome of cool. And let’s not forget the hours spent trying to stand these top-heavy titans upright, only for them to face-plant right as Skeletor makes his grand entrance. It’s a nostalgic battleground where every fan has a story, and no one escapes without passionately defending why their favorite should reign supreme in the Greatest Action Figure Lines of All Time.