An action film typically involves one or more heroes facing challenges, threats, fights, explosions, and an evil villain. Key elements include action sequences like fights, car chases, and explosions, as well as fit, good-looking lead actors. Examples mentioned include Fast Five, The Dark Knight, and Die Hard. Reasons for enjoying action films include star power of actors like Arnold Schwarzenegger and Jason Statham, special effects, fan communities, and learning about new films through reviews and word-of-mouth.