It could be a scene, a piece of dialogue, something from the lore, or a personal achievement etc. What's your crowning moment of awesome in Skyrim?
Mine's simple, it's when I did my dragon killing animation on my first Dragon outside Whiterun to the part in Skyrim's main theme where it goes "Dovahkiin! Dovahkiin!"
It was the perfect way to get introduced into dragon slaying.
Fighting a bunch of draugr, losing and almost dead, then I do a moving power attack with a greatsword and take some 7 draugr at once. I suppose that was quite convenient. Hadn't saved for a while.
For me it would be: I was fighting an Ancient Dragon with my wife(Jordis the Sword-Maiden) and as it lifted off into the air, my wife shot it with an arrow and it caused it to crash land. After it recovers from the landing, I proceed to kill it with the killing animation. It was epic.