Marchers say that the Dornishmen are liars, and famous for it, but the Dornish say the same of them (III: 496)
There are no major cities in the stormlands, but Cape Wrath, the Rainwood, and the Kingswood are all fertile enough (SSM: 1, 2)
For thousands of years, the marcher lords were the first line of defense against Dornish incursions, so they have strong martial traditions and some strong castles (SSM: 1)