At this point I'm convinced that the Northmen are all those memes you see about Eastern European Hicks come to life, Robbard and the boys go for a night on the town and almost get killed trying to outdrink an honest to gods Dragon, and then watch as a 6 year drinks them all under the table. Once cars are a thing I fully expect the north to pioneer something analogous to Finnish Folk racing.
Yep. But all the cultures have their own breed of insanity:
The river lands have insane amounts of competitive swimmers that try to swim against the currents of the most powerful river on the continent, and there are people who do that. In addition to their love of all things fishing and river sports.
The Westerlands have people who are basically the memes of Scrooge McDuck, with all of them trying to have ideas like swimming through gold.
The Valemen are mad enough lads to do alpine across the mountains of the Vale for fun. Like they make the Alpine craze in the 1800s look tame and the free climbing insanity of the late 90's and early 2000's look like a picnic. They are some of the best free climbers and alpine enthusiasts in the world.
The Crownlands… to put it bluntly, love to camp in the forests and fields of the crownlands… even at the risk of their lives to the dangerous beasts and local authorities. Even though we have to many fuckign people that might not understand how to conserve and be stupid.
The Stormlands. All I shall say is that they love hunting more then they love fighting. it's why they think Viserys is such a fucking G. He throws hunts all the damn time.
The Reach... The flower of knighthood, in fact, loves gardening, and equestrian pursuits.
I shit you not, everyone is good at horses. Even the people who can't legally ride them