That's all subjective. You might think a quest or character is amazing and I might think the opposite.
Well then isn't the world building subjective too?
I like Obsidians more because it tries to portray itself realistically with it's environment rather than have a ancient tomb which has been untouched for centuries every 50 meters.
So if it's subjective, how could Bethesda be way better than Obsidian?
[edit]
And this isn't subjective, Obsidian managed to make faction reputations, faction disguises and make sure they worked with quests and characters who would shoot you if you pissed them off but would not shoot you if you disguised yourself.
What did Bethesda manage to do with factions? Or "guilds"?
Nothing.
The guilds are even shorter than before and even more meaningless and has less choices.
How could this be subjective?
Obsidian handled factions better, making them interact with one another, allowing you to wipe them out completely or to help them only to screw them over later, they allowed you to befriend or vilify factions and even be forced to use faction armor to disguise yourself.
What did Bethesda do with factions/"Guilds"?
(And no "opinion" crap, let's find out which of the two developers made factions better by using facts and not opinions.")
((Example: If someone builds a bridge out of rope and boards and someone else builds one out of cement with supportive pillars underneath it, the cement bridge would, by all factual means, be better.))
[edit2]
Ah, so now it's opinion.
Well all right then.
I'd still like to discuss which of the two developers is the best at designing though.