Larian writers don't seem to like using tropes commonly used in similar games, perhaps because they think they know better. As a result the whole party feels like a DnD table where everyone has main character syndrome.
I don't feel that way, I even feel like most CRPGs out there have the opposite syndrome, being the "side character" syndrome. They are most often there just to be a prop for the player, to conform to their cliché and they barely feel like character with a motivation. Their goal is the player goal and they show pretty much no sign of sentience when presented with any situation.