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.
"Honeysuckle was the saddest odor of all, I think."
"'All righ, den," Luster said. "You want somethin to beller about?' ...'Caddy! Beller now! Caddy! Caddy! Caddy!'...But he bellowed slowly, abjectly, without tears; the grave hopeless sound of all voiceless misery under the sun."
True Art Is Incomprehensible: Subverted slightly in that by the time you finally reach the end of the novel, you have at least a basic understanding of what just happened. Still, the first two sections pretty much fit this to a T.
"Benjy, whose eyes are our only window on the Compsons thus far, is one of the most incomprehensible and challenging narrators in all of literature." - Spark Notes. When they call something incomprehensible, you know it's difficult to understand.
The Woobie: You can pretty much take your pick between Benjy and Quentin.
Jason emerges as the Jerkass Woobie in some interpretations since he had his nastiness beaten into him by his mother.