Too bad you never played Planescape: Torment, which is up there with Fallout as "Best RPG" ever. Fallout has better gameplay and sandbox stuff, but Torment has a better story and each NPC has a subplot that unlocks more advanced versions of themselves as you progress along it.

Unfortunately the Planescape setting now lives in WotC's "dustbin of history" and will likely never see the light of day again.