Yes, Skyrim is one of those games. The kind of games that go: ''Oh, so you got some power that could save the world? Why don't you use it to save the world?''. Yes, it's the boring ''save the world'' cliché story.
Sometimes, you want to use that power in manners not intended by the giver. Sometimes, you want to wreck havoc in the world. Sometimes, you want more power.
In short: you want to watch the world burn.
See, the reason why I will never ever bother with the main quest is that it forces me to do just that: save the world. Well look, I would save Nirn if it can save itself. But considering that there's a civil war, the Empire's weakening and, surprise, the Thalmor, it's obvious it can't. Actually, while I'd do it, I'd expect to have a option to take over Alduin's vacant throne. Unfortunately, there isn't.
Look, I want to see if I can drain a human soul for use in the shouts or with one. I want to be capable of using a dragon as a meatshield for other dragons. But no, the ''Divines'' has to keep you under their leashes, so you can't be creative with your unique power. You can't shape it as you see fit.
Seriously, if I am expected to wield that power, can't I use it to be a threat bigger than Alduin and the Thalmor combined? And if I can scare Daedric Lords, why can't I scare the ''Divines''? Why?
Guess that's why I praise karma-based games, after all. At least, they took how you want to use your powers in consideration.
All and all, why there's no karma system in this game? Bounties are sorta meaningless after a while.