FO3 had characters? who exactly?
I can't remember anyone. Even New Vegas did a better job there by having interesting NPCs such as House or Boone.
It seems like you're limiting yourself too much to the settlement system with its radiant quests.
Ignoring them makes the game way more enjoyable... and even without them, there's still 3 times as much content as there was in FO3.
Good combat mechanics don't make a game immediately an 'action' game...
Do we really have to cripple the shooting aspect of the game like it was in FO3 and FONV, just so that it feels less like a shooter?
Try replaying vanilla Fallout 3 today ^^ You'll hardly find any quests at all, the world will feel very deserted and empty... you'll finish the game within 50 hours completely.
It's nowhere near the size of a Skyrim or FO4, where you get completely flooded with quests and have 10+ of them in your inventory all the time.