So, yes, maybe he's got that over the Steven Seagals of the world, regardless of the Judge Dredd-level turds that followed.
The gun later won an Oscar.
Now ask yourself -- would anybody have given a s**t about Rocky if the studio had gotten their way and cast a star like Burt Reynolds or Ryan O'Neal in the lead role? The whole point was that this guy was a schlub, a down-and-out boxer. Something about Stallone in that role just made people believe in it.
Specifically, his face. The face that looked like it had spent decades taking blows to the jaw. You can say the same thing about First Blood -- this time a down-and-out soldier instead of a down-and-out boxer. The signature Stallone roles just wouldn't feel right without that signature fucked-up face giving his mouth a permanent snarl. But how the hell did it get that way?
Just try to imagine him screaming anything but "Adrian!" It can't be done.
As romantic as it would be to blame Stallone's droopy face on a lifetime of hard living and tough breaks, Stallone's lazy facial features are actually due to Bell's palsy, a facial nerve paralysis condition that was caused by birth complications. Namely, he was yanked into the world with forceps that also came into less than pleasant contact with his face and severed a nerve, effectively paralyzing the lower left half of his face (including a bit of his tongue). And just like that, literally, a star was born. Schwarzenegger only wishes he were that lucky.