These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Unless, of course, your name happens to be Moe Vernon...
Kick the Dog: Possibly Dennis Hopper in real life for getting Laurence Fishburne hooked on heroin at the age of 14.
Misaimed Fandom: The helicopter attack scene. Use of the Wagner music was actually intended to invoke the Nazis. But what did Coppola expect, using such Awesome Music?
Older Than They Think: The premise of the movie, as well as the famous line, "The horror... the horror...", are taken directly from Heart of Darkness.
Well-Intentioned Extremist: Colonel Kurtz can come off as this. In the opinion of some viewers Kurtz might be one of the only sane characters in the entire movie, he realizes how the war can be won but his commanders refuse to see things the same way he does.