We really heard the phrase "opposites attract" and ran with it.
Hear me out, there are so many trope ship dynamics that, at the end of the day, can be boiled down to "opposites attract" and I'm going to name just couple to prove it.
On the opposite side of some kind of conflict, from different backgrounds and life experiences, might even have opposite moral compasses.
I may be slightly presuming you know what I mean by this but let's just say it's a very common character aesthetic because of prime colours.
One of them is normally more introverted while the other is extraverted. Or they butt heads a lot.
The Jock/popular girl is ever seen as well loved by everyone or a bit of an ass, and the nerd is seen as quiet, keeping to themselves.
They normally end up together via tutoring sessions given by the nerd.
Royalty from a high class background where they are not given that much freedom and either don't realise it or are fed up of it and want to be free. In most of the things I've read they meet the commoner because they've snuck out of the castle/estate or the 'commoner' works in the grounds, therefore seen as lower/working class.
I'm not actually sure if this is a well-known one or just one that I've seen a couple of fic use but it fits.
If you use the Disney film as an example. Belle is perceived as beautiful and smart but from a simple village and the beast/Adam is perceived for most of the film as as ferocious and a little feral from a formally grand castle.
The whole film was based around the concept of opposites attract and looks don't matter, you can't convince me otherwise. I've seen a very similar concept be used in other fics that don't directly linked to beauty and the beast but it's the most well-known case.
Flower shop and tattoo shop AUs
The florist is most likely seen as bright and chipper, while the tattoo artist may be seen as edgy and intimidating.
These are just a couple but feel free to add to it because I find it interesting that despite it being a very simple concept we've found so many ways of exploring it.