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.
Darlin' I love you, but leave me the fuck alone...
Ensemble Darkhorse: The temperamental and foul-mouthed Mayor is likely the most popular character in the film.
Hide Your Gays: Margaret being a lesbian is only brought up once and briefly, so you'd be forgiven for not knowing she's a lesbian.
Memetic Badass: According to the wrap-up tape, Bill Pardy ended up as this for the cast and production staff of the film.
Tear Jerker: The look Starla and Grant share before she has to blow him up.
Unfortunate Implications: The only characters to survive are the ones that seem to be a bit more open-minded or educated, in other words: those that die are country folks or red necks.
Fridge Brilliance: The only ones that survive are the ones willing to learn and adapt, in other words evolve, like Starla was teaching earlier in the film.
Also, let's be fair; while there might be something to the 'country folks and red necks all die' point, equally it's not like 'being open-minded and educated is a good thing, and might come in useful in a crisis or even save your life one day' is the worst message a movie can have.