Agree on the railroading (though most RPG's are guilty of this), it basically force you to meta-game which in turn drags you kicking and screaming away from immersion land.
At this point it sounds as though you're holding Skyrim to a standard that no RPG ever made can meet. Quests (and quest lines) are triggered by the PC. I'm pretty sure it always has been and always will be this way.
Din's Curse actually has the entire world and plot moving, no matter what you do. Plots are usually generated by random presets on the map, and how the individuals react to them and each other (example: a town with little food will have plenty of people begging you for food, and if you don't help them, they might steal/kill someone for food/die of hunger) Opposing groups of monsters will murder each other in the dungeon, with the winners leveling and becoming stronger, and if the town is attacked and you don't get back, then you better have given the townsfolk decent equpment to fight them off. Granted, the game is low on story, but I hope one day open world games will be able to do this.