It's the little touches that really make a game. Case in point: In Metroid Prime 2, whenever you enter a save station, Samus slumps her shoulders and looks ever so slightly downward, in a way that conveys very well that she's _tired_. She knows she has to continue on, and she takes a deep breath and straightens up immediately after saving, but that brief moment of vulnerability really shows you that Samus is a _person_, not just some kind of idealized force of good.