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: Looking for Alaska
Follow the Leader: John Green's subsequent works tend to have more than a passing resemblance to the characters and plot already featured in LfA, particularly Paper Towns (though that book is an intentional Deconstruction of LfA)
Strangled by the Red String: One of the few intentional (and well-done) examples with Miles and Lara. They have approximately less than zero chemistry and hook up without any sexual tension or build-up... but this makes sense. There is no substance to their relationship. Lara appears to take no interest in forming a deep connection with him, while Miles is already in love with Alaska.
It's possible Alaska only decided to try hooking them up because she knew Miles had feelings for her, but she was already in love with Jake and didn't want to destroy Miles in the process. So she picked the first girl who had a crush on him.
Tearjerker: Alaska's death, full stop.
Each character gets a turn at this when they play 'Best Day, Worst Day'. Lara had to leave her childhood behind when she moved from Romania to America, Pudge was humiliated in seventh grade and vowed to Stopped Caring (until he came to Culver Creek), The Colonel's dad walked out on him after being an abusive partner to his mother, Takumi watched his grandmother burn on a funeral pyre and Alaska watched her mother die right in front of her, then her father blamed it on her. Ouch.