there was no options in TES: Oblivion where you get to do main quests or side quests and get a different outcome, a different experience.
In my opinion,
I would love to see some options in Skyrim for both main quests and side quests (not all) but some that could very much alter the future of a town or someone that could either go against you in the future or aid you.
And I wish they would not be as easy to see as 'good' or 'bad' choice but rather in the middle, so it doesn't become so black and white.
Example; One girl is being harrashed by the city guards and you decide to intervene and you learn from the city guards that she have murderd a city guard and they can't find his body but they know it's her because she was last spotted with him.¨
You now have two options in front of you, accept what the guards are saying and go on with your own business and let them handle the girl.
Or you can question the city guards and try to help the girl, as you believe she is innocent.
So now you take on a new quest to find the 'real' killer and maybe the body of a guard. So far you know the guard was spotted near a cave last time he was seen, so you enter the cave to search for clues.
You discover the body and you also find some clue that lead you to believe 100% that the girl did actually murder the guard for a reason you do not know.
So you come back to the guards and the girl.
Now you have two options:
A] Tell the guards the truth.
B] Lie to them and tell them there is a bear nest in the cave and he was 100% killed by angry bears.
If you say take the last option, you start a conversation with the girl as the guards leave.. she seem shocked and want to reward you for helping her so you will get a quest to meet her in the woods outside the town..
But when you show up, she tells you that she can't trust you to hold the secret because she knows that you know it wasn't a bear who killed the city guard.
Now she flees and thugs start to attack you!
You fight off the thugs and catch up with her, hiding in some ruins.
A] Now you get the option to either take her in to the city guards where she may get death penalty or go to prison.
B] You may slay her yourself as you seem that to be fair as she tried to get you killed aswell.
C] You can let her go, tell her to run off.
So that was my little bad example but I'm sure you all get the idea.
I would also like to mention that would be awesome in my opinion, to see impact on the world around you by the choices you make. Maybe new towns get builed, or a tavern because you helped a old man with something. Or maybe towns get destroyed, who knows.
I just think this brings something that belongs in the RPG genre and brings also alot of replayability.
So thanks for reading!
Cheers.