Here is an example from Witcher 3 that defines that games are for me - engaging, awesome interactive storytelling experience. in Vellen (not the start location but very soon thereafter) right below the river Pontar there is a very low level location with various mini villages, stand alone huts, etc. so I travel through that area on horse and see a 4-5 men trying to set a building on fire. ok, curious , I stop and try to talk to them - these are local 'human first' supremacists burning alive an elven 'witch' according to their words. are they right? wrong? no way to tell? no other side of the story to listen to other than curses from behind the door on all human kind. ok, I will be a hero and tell them to leave her alone, they kick my butt and I run away making the 'witch' die.
Not what I want, however I am way too low of the level to fight racists (or agents of justice, who knows). so I load the save before even getting to the area (so I never seen this fight, hut, situation, etc) , level elsewhere, and when remember oh, time to save the girl. to my surprise, when I come to the same location, I do not see the revenge seeking group, nor the hut, all I see is burned out shell. WTF?? I never been here, I never triggered the script, why this happened?? so tell me, why would a grown man with kids of his own would feel real guilt for not 'saving' an imaginary character in completely mad up world? or feel sorrow, joy, and other strong emotions from interacting with that world? and this is a trivial mini place one of many and many hundreds in Witcher that is very easy to miss and/or ignore, not even a quest or anything, witcher had dozens on dozens of situations where choices lead to consequences, frequently not what you expected them to be at all and still making sense. to me, getting a person involved that way is the true fun on the role playing games.
if computer gaming will continue to evolve into engaging experiences (i.e. I head very good things about Last of Us even if I care nothing about survival horror game), it would continue to have "adults" as its fans. Mass Effect series (second in particular), earlier Elder Scrolls before them becomes console targets, the list is few but fun and fun to revisit. I still remember first neverwinter nights or planetscape RPGs with Nameless one where it was fun vs mash the button/kill the mob/rinse/repeat of current 'action-RPGs' hybrids...
if this thread can offer other great experiences they had (recommendations), I would be interested to hear them