Before the MCU became a cultural juggernaut, one film lit the fuse. Robert Downey Jr. doesn't just play Tony Stark — he *becomes* him, bringing charisma and surprising emotional depth to every scene. The suit itself? An absolute showstopper that still holds up today. But beyond the spectacle, there's a grounded story with real weight underneath the armor. If you haven't revisited this one lately, the film that launched a generation of superhero cinema absolutely makes this one worth your time.