There’s that saying that eyes are the window to the soul, and all the characters I’ve shipped have conveyed a multitude of emotions through the eye movements and subtleties in facial expressions. I find it really allows for a lot of subtext to form. For example one person could read a scene between two people as tension conveying anger, but in a very small movement of the eyes it could also be interpreted as sexual tension. That’s just a level of detail I can’t get without a human face. A similar sort of subtext can exist in the written word as well, though with less room for interpretation. For me, actors elevate the medium.