Anvilicious: According to this Overthinking It article the 1980s Conan movies have strong feminist, anti-racist and atheistic themes. Of course, the major screenwriter of the first film isOliver Stone, which lends some credence to that. On the flip side of that coin, though, director and co-screenwriter John Milius self-identifies as conservative/libertarian in his personal views, Conan himself is a fiercely independent warrior who eventually becomes a king on his own steam, and the film explicitly shows Conan praying to Crom (albeit in a backhanded fashion) and that there is an afterlife when Valeria briefly comes Back from the Dead.
Awesome Music: Basil Poledouris' work on this film is considered as one of the best movie soundtracks ever made. In fact, there are some music critics who consider this score to be one of the greatest classical music compositions of the 20th century.
To highlight some tracks, "Riders of Doom" is an epic anthem worthy of an army's final stand.
Complete Monster: The evilThulsaDoom starts by slaughtering Conan's village, decapitating Conan's mom while he stands next to her and selling the children as slaves just so that he can obtain weapons of fine steel from the barbarians. Later in the film, he orders a young woman to jump to her death to illustrate how much control he has over his followers before ordering Conan to be crucified. Shortly after that, we find out that he and his followers practice cannibalism. He proceeds to kill Valeria, probably Conan's greatest love in the movie-verse, with a snake arrow. After Rexor and his army's defeat in the Battle of the Mounds, Thulsa coldly tries to do the same thing to the Princess after deeming her no longer useful to him.
Cult Classic: The film was cultic in due time because of its extreme masculinity and shocking for that time of violence. He can also be like that now, if you are a fan of Arnold and bodybuilding.
Gateway Series: Although the film is associated with bodybuilding only indirectly, at one time it became a huge advertisement for this type of sport and Arnold in particular. Most people who started to pump muscles under the impression of his acting career, most likely will say that they did it under the impression of this film.
If not Terminator, then for many people Arnold would forever remain Conan.
Even people who haven't seen the movie can quote the "what is best in life?" scene (although the original is attributed to the real Genghis Khan, an expy of which is in the scene).
Prologue Mako is so epic that it was later copied many times and parodied in other films.
Genius Bonus: They actually got Turko-Mongol paganism right when they had Subotai (Hyrkanian, basically the Hyborian equivalent of Mongols and Turks) proclaim that he worshiped the Everlasting Sky. In Turko-Mongol paganism, the most important god is Tengri - Lord of the Eternal Blue Sky. In fact, it's more accurate to actual pre-Islamic Turkic beliefs than the original Howard stories were, where the Hyrkanians worship Erlik, who in actual Turkic paganism, is an evil demon and the primary adversary of Tengri.
This strange scene, where the priest examines Conon's chest with the words "you have a beautiful body, you should not be afraid to show it!"
And so, we have a scene of orgies, where the approximate ministers of the cult are making love and eating with human meat. But where are the two main assistants of Tulsa Doom? When the battle begins, they appear together and half-dressed...
Narm: Conan's grunts of pain doesn't sound very convincing.
Narm Charm: Although many of the quieter scenes are actually well done, a good portion of the movie is narm. Awesome, glorious narm that fits both the setting and the story like a glove, somehow managing to be incredibly moving when in many other movies it would be just plain ol' Narm without any of the charm.
Nightmare Fuel: Although the film itself may seem amusing in our time, his hints of cultist cannibalism are still quite oppressive.
The camel who gets punched out by Conan. It returns in the sequel, where it suffers the same fate.
Conan's father only gets one scene and one speech. It's all he needs.
Signature Scene: Many, but mostly monologues of Conan's father and Tulsa Doom about steel and power and the orgy scene together with the kitchen of cannibals.
Seinfeld Is Unfunny: Although now the film can have a lot of Narm Charm or even seem Stealth Parody on old fantasy films, at one time it was so shocking and revolutionary in its masculinity that it became almost a revelation for the then teenagers and boys. Now, after more than 20 years and after several generations of various horror and action films, it's very difficult to believe that when the film was considered to be extremely cruel or even "fascist".
Strangled by the Red String: Pay close attention to all of Conan and Valeria's scenes together after they first meet. He doesn't say one line to her!
As Roger Ebert noted as early as the film's release: Conan becomes a Germanic superman with a black arch-enemy. (As hinted by his name, the original Conan was Celtic (or rather, his people were ancestors of the Celts) and in his original stories he had no arch-enemy at all. Also, the literary Thulsa Doom has blue eyes and straight hair and is swarthy rather than truly black; rather than seeming like an African, his race was intended to be that of a mysterious, mystical people that had vanished from the world long ago.)
Also, the literary Thoth-Amon (the other inspiration for the film's Thulsa Doom) while being non-white and wicked had several noble qualities.