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.
Award Snub: Before Sunset and Before Midnight earned Best Adapted Screenplay nominations, but the leads and director never got nominated for their performances.
Even Better Sequel: Many critics thought Before Sunset was superior to the original film and attributed this to how the characters, actors and directors matured over the years, as well as Hawke and Delpy's contribution to the screenplay (which was nominated for an Oscar).
The same is being said now about Before Midnight.
Reality Subtext: The first film was born from the night Richard Linklater spent with a woman named Amy in Philadelphia. Unlike Jesse and Celine, they exchanged contact info and tried the long distance relationship, but things fizzled out, so the ending of Before Sunrise became Linklater's idealised version of events. Linklater admitted later that he hoped Amy would see the film and get in contact, but that never happened. A decade later, that idealised notion became part of Before Sunset, in which Jesse wrote a novel about the events of the previous film and Celine read it and got in contact. It wasn't until 2009 that Linklater learned Amy had passed away fifteen years earlier, and thus never saw the original film.