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.
YMMV: Ratman's Notebooks
Adaptation Displacement: The original book was overshadowed by 1971 version of Willard, which was in turn overshadowed by its 2003 remake
Crowning Music of Awesome: Crispin Glover singing Ben during the end credits to the 2003 movie. Oh, and for good measure, he is accompanied by an accordion.
The Woobie: The Main Character, but more so in the movies than in the book.
Crispin Glover's Willard particularly gives us a really good performance of him. His fall into madness is really something to see, and his woobieness is just something that he alone could pull off. Some critics have even called this the best performance of Glover's career.