Popular kid hangs out with geeky girl. Geeky girl and popular guy fall for each other. Geeky girl turns out to be gorgeous (she just needed to ditch the overalls and get a haircut). Popular boy does something stupid. Geeky (but suddenly beautiful girl) make up, make out, and live happily every after.
Almost every teen movies of the 90s played that scenario into the ground. It got a fair amount of play in the 80s too. It always bugged me though.
Not the storytelling itself, but what it said about us as people. It seemed to be telling us that inside every loser was a popular kid waiting to come out, and that being pretty and popular was the thing we should all seek to attain. It wasn't about recognizing and celebrating who we were, it was about telling us who we should be.
I tried really hard to make sure that my stories are about real people. If a good looking guy is going to hook up with a geeky girl, it's going to be BECAUSE she's a geek, not in spite of it. He's not going to try to make her over or transform her into his vision of perfection and popularity.
Because, while there's nothing wrong with being pretty and popular, it's definitely not all that.