Romione headcanons:
The height difference between Ron and Hermione. He’s really tall and gained a bit more muscle after the war, so she likes cuddling him because it feels like being wrapped in a huge blanket.
Ron likes hugging her too, especially if he gets to hold her tightly for a long time and just stay silent. He picks her up often just because he finds it fun, and she thinks it’s really hot. Ron’s the big spoon.
Ron likes listening to Hermione read to him. It had taken her some time to get used to somebody listening, but she loves it too. Ron puts his head on her laps while she caresses his hair.
Hermione likes dancing to muggle rock music, so she let Ron listen to the biggest hits, and Ron loved it. They own a record player and sometimes they dance to Nick Cave, Bob Dylan or Fleetwood Mac. Ron also loves Bon Jovi now.
Hermione is still not really good at cooking, so Ron’s the cook, and she enjoys it so much. After all, she’s good at plenty of other things, and it’s important for Ron to have tasty food.
They often go on double dates with Harry and Ginny because they just feel so comfortable in each others’ company. Sometimes Harry and Hermione show Ron and Ginny the muggle world (cinema, coffeeshops, shopping), sometimes they go to Hogsmade or Diagon Alley together.
Otherwise they are really private about their relationship, they even keep their engagement a secret for some time (not from Harry and Ginny though). They enjoy being alone around each other and having their inner jokes/secrets.
Ron brings home sweets from the Weasley shop because Hermione has a severe hunger for candy after her pretty candyless childhood. Ron’s memorised all of her favourite tastes.
Hermione’s taught Ron how to play the piano. It took a lot of effort and practice, but every minute was worth it, because it was her. He now plays her favourite pieces and something more modern like Beatles or City of Stars.
They loved La-La-Land.
Hermione goes to sleep late, while Ron — early. But she loves reading at night while his head rests against her shoulder. Or even when he’s just near her.
Ron has beaten up a dude once for him calling Hermione a mudblood. Ron’s always had a temper, and Hermione’s his wife now. It landed on the first page of the Daily Prophet, Hermione tried not to leave her cabinet for a week after that. But she was low-key proud and content.
Unlike Harry and Ginny who are batshit crazy and fun loving and passionate, Ron and Hermione are very romantic and gentle and soft with each other.
Ron is absolutely amazed by his wife and thinks that she’s the coolest person ever.
Hermione loves Ron senselessly and has never been so comfortable around anybody else.