The Whole cut scene Introduction and Tutorial I thought was pretty amazing.
The fact you can have scars and face paint.
I've had a few 'WOW' moments so far, the first time I approached a Word Wall, the music, the way the screen went dark except the inscription on the wall which lit up was pretty amazing.
Another 'WOW' moment was the first time I got a cut screen animation when I killed a dragon.
Speaking of dragons, after I killed a few bandits last night a shadow came over me, I looked up and it was a Frost Dragon just hovering about 30 feet above my character, and he didn't attack me until I looked at him...
The Shout: Storm Call
The Spell: Reanimate
Something small but I find very awesome, that purplish effect (similar to when you conjure) that happens for a split second when you go invisible.
Also when you throw a body in a river, it floats down stream...
After I completed all the Thieves guild Quests I went back to Everglow Estate, The first time I was so sneaky I didn't kill anyone. When I went back two dragons were attacking it, There were a large number of guards fighting off these dragons (or trying to), I used my Storm Call Shout, (for which I have 2 words) then snuck around usuing the Shadowcloak Power obtained after returning the Skeleton Key. It was an epic battle that ended with everyone dead except Vladenov, my badass Breton. One of the greatest 15 minutes of Videogaming I have ever experienced.
The intricate detail to the social environment of Skyrim, the fact that Khajit are not allowed in cities and live and nomadic traders, the Nords are racists, The Dark Elf Mage Apprentice has ties to the Telvanni (Best Great House in Morrowind)...
The Perk Tree system of Character Development
Best Game Since Morrowind
Vladenov the Hun, Breton, level 37, Mage/Stealth mix, I would classify him as a Druid.