Awesome Music: While the music was indeed lifted from other sources, one cannot deny that the editors were very wise with the selections that they chose, since this would be the last film until Godzilla vs. Mechagodzilla II to feature Godzilla's theme as it was heard in Mothra vs. Godzilla. The music from Mitsubishi Pavilion is also very wonderful and when it's used during Anguirus's friendship moment. It strikes a chord. What's not recycled, is Kunio Miyauchi's catchy Godzilla March as sung by Susumi Ishikawa.
Complete Monster: The titular monster, Ghidorah's Dragon Gigan, was nearly as vicious as his compatriot, burning most of Tokyo to the ground, laughing all the while. What truly made Gigan stand out, however, was his sadistic love of hurting others. During his and Ghidorah's battle with Godzilla and Anguirus, Gigan repeatedly opted to go for torture rather than finishing an opponent off, dragging the other monsters in close and using his buzzsaw to carve pieces off of them, and showing a distinct preference for targeting those who could not fight back, attacking a severely wounded Godzilla while he lay bleeding on the ground, and later, in Godzilla vs. Megalon, teaming with Megalon to deliver a No-Holds-Barred Beatdown to Jet Jaguar. Prone to abandoning his allies as soon as the going gets tough, and hating a fair fight, Gigan was Toho's reigning king of Kick Them While They Are Down.
Narm Charm: Like many Showa-era Godzilla movies, this one is most definitely not a cinematic masterpiece but it has its moments. Fans really seemed to like Gigan himself, and the climatic battle (when its not using Stock Footage) has some memorable moments such as Gigan being the first villain to make Godzilla bleed and Angurius's Friendship Moment.