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.
Crowning Music of Awesome — The scene where Muriel tries on the wedding dress for the first time featured a reworked version of Dancing Queen.
Hollywood Homely — Toni Collette reportedly put on 40 pounds in 7 weeks with the help of a dietitian in order to play the role of Muriel, and unflattering wardrobe and make-up were used to give her a more homely look. As always, however, your mileage may vary.
Tear Jerker — Muriel's mother arrives late to the wedding and is stood in the back, Muriel walks directly past without seeing her mother who starts to cry. Cue tissues.