the film is and was awesome with the only weak spot being the inexplicably overdramatic crenna, it's cringe-inducing whenever he starts to speak. the sequels are nothing short of idiotic, starting with the headband - he wore the thing as a bandage and somehow it became his identity.
do yourself a favor and read the book. the characters are downright psychotic, the lot of them. way less action and more introspective explorations of two men descending into their own private hell, getting crazier by the hour. morell wrote it after watching reels from vietnam and talking to psychotic vets.
tarantino quipped once that he'd like to do the book, with adam driver as rambo and kurt russel as sheriff.