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: My Girl
From the movie
Big Lipped Alligator Moment: Vada getting accidentally locked in the basement. It comes a little out of nowhere, is played for a moment of drama but Vada is ultimately fine in the next scene and it doesn't get mentioned again. When Shelly speaks to Harry about her concerns, she references an earlier moment but not this scene - rendering it kind of pointless in the overall narrative.
Crosses the Line Twice: Vada's grandmother is senile but sometimes occasionally gets up and starts singing spontaneously. One day Vada is supposed to be watching her and she gets up from the living room...and walks right into someone's funeral to start singing. You feel bad for the poor unsuspecting mourners but at the same time it's a hilarious situation.
Vada and her grandmother also play a darkly hilarious prank on some kids in the opening scene, which plays on the elder's senility.
Fridge Brilliance: Shelly's ex-husband makes a wisecrack about Vada's name when he first meets her. Why would he pick on her when he doesn't even know her and has nothing against her? However Vada's father is Shelly's boyfriend and he's the one who gave her the name. It was likely a subtle dig at Harry like "What kind of idiot names his daughter Vada?"
Fridge Horror: Thomas J's death happens in a rather secluded part of the woods. Exactly how long was it before he was found?
Hilarious in Hindsight: Jamie Lee Curtis is able to act as a surrogate mother/big sister to a young girl. Fast forward to 2003 where she is completely unable to relate to her own teenage daughter.