Nothing massively "stands out", it's subtle. The wide open country, the decentralised government, the romanisation of fairly grim periods of history, no one raising an eyebrow when people walk around carrying weapons, the square jawed heroes who are actually heroic, rather than disguised villains, etc. It's basically Howard vs Tolkien.
Of course, if you get into the art, the trees and wildlife stand out. Don't get many moose or wolverines in the UK, and the forests are green and grey rather than red and gold.