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.
Anvilicious: The scene and speech at John's birthday party.
Fanon: Fans seem to agree that Beth is at least Bi.
Fan-Preferred Couple: There isn't much fanfiction for it but 60% are Kate/Beth and probably 39% are Kate/John with Scott being part of the other percent.
Fridge Horror: The girls trying to work out who Kate is by asking if she took a year off last year to go into rehab, then for bulemia or fat camp. Brittany Snow actually suffered with eating disorders in high school and appears fine - if someone had genuinely just come out and asked those things, well, it sounds really insensitive. Good thing Snow's ever the professional.
Hilarious in Hindsight: The Tucker brothers, John and Scott. John is hugely popular while Scott is widely ignored. Nowadays Penn Badgely is a popular actor while Jesse Metcalf has diminished in popularity.