Gamers Role-Play Melodramatic
Considering that melodrama was the first type of acting, maybe it's a good stepping stone in the right direction. Characters are different to players and sometimes a caricature of their personality is required to change into their mindset. If it's too subtle, the player's personality can come through.
Also, Dungeons & Dragons doesn't have to be pure crunch. Even if they're not real, characters should have their own thought process, much like any decision made in real life. But I will agree that the melodrama cannot span multiple pages in such games.