A meta-version of Awesome for Robert Duvall, for his delivery of the "I love the smell of napalm in the morning" monologue. Actors kill to get dialogue like that.
They also win Oscars for it.
Alternatively you could look at Marlon Brando's presence in the film under the same light. Very few actors could overshadow every other scene in a movie with approximately 10 or so minutes of screen time. In a way Kurtz and Brando were exactly the same, big characters that cast a shadow over the story but only actually show up at the very end.
Additional props go to Brando doing the whole thing off the cuff because he didn't read the script. It really speaks to his talent as an actor that he's able to make a movie defining performance for a script he didn't even read.
Another meta-version - if you watch the behind-the-scenes documentary, the fact that Coppola managed to finish the movie at all, much less make one of the most iconic movies of all time, is nothing short of a miracle. Whether or not this should be considered awesome, considering the torture that not just Coppola, but the entire cast went through, is debatable.