Right now CK3, but we'll see when Victoria 3 gets released. The Crusader Kings series focus on characters over nations makes it much more immersive and makes s

Right now CK3, but we'll see when Victoria 3 gets released. The Crusader Kings series focus on characters over nations makes it much more immersive and makes situations that are unfun in other historical grand strategies games much more interesting to play (for example, playing as a Vassal), offering multiple options for playstyle, whereas in something like EU4, you're almost immediately going to min/max to get independence as a Vassal because it's not fun, there's nothing to do. Meanwhile in CK3 you here stories of people managing to control large kingdoms as small vassals through intrigue and puppetry.