Now what I want to know from you:
Which do you prefer and which parts of the game require which one.
Now when you discuss this topic don't think I am saying very little quality and mass amounts or just one or two with amazing quality. I am talking about the balance between them. Think of it this way in regards to vaults. Would you like 10 vaults which have monsters in them and just a simple (a gas pipe broke and everyone died)...or would you like about 3 or 4 vaults with a story like
Spoiler
so think of it as balanced yet slightly tipped rather then the extreme of one or the other. The one where the overseer needed to be sacrificed.