This is thought that deserves more attention, but all I have got is this for now:
I think RPGs, as a form, are capable of exploring some of the various aspects of the human condition like fear, love, tragedy, revenge, death, longing, etc.
These are games that would be more "serious" than others. (1)
I'd like to play/run games that do the above, at least sometimes.
But that never really happens. I am not sure why,
(1) I am not implying that these sorts of games are better -- in any sense of the word -- than other sorts of games. I am just trying to differentiate the tone of said games from others. Also, I would imagine, there would be fewer jokes about bodily fluids and/or Monty Python references.