Originally Posted by wolfing 
The description of its RPGness is basically the same you would say from any adventure game, or action game, or anything with a well developed story pretty much. Basically that you 'feel about the characters in the game'.
That builds on the confusion between narrative games and RPGs.
How deep the player gets involved in a game through the story is a quality marker for a narrative game, not for a RPG.
Stories are not the main in a RPG, situations are.