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: So Long, and Thanks for All the Fish
Tear Jerker: At the end of the book, Marvin, who (thanks to time travel) is 37 times older than the universe and has had all of his body parts replaced multiple times (except for the diodes on his left sides that have been paining him for all his existence), dies .... But not before reading God's last message to his creation saying, "We apologise for the inconvenience."His last words? "I think.... I feel good about it."
The tear-jerking implication is that he only thinks he feels good about it... because he's never felt good about anything before and doesn't know how it's supposed to feel.