Was? You mean is, don't you?
My favourite thing is everything except the excessive amounts of fights we have to put up in this game if we want to actually play it.
The large and detailed environments where you can explore for a long time.
The environment. With luscious mountains Todd Howards points out for me to climb on, a pale winter wonderland full of ice wraiths that are out to kill me, foggy hills full of primitive cannibals, and a steamy tundra that is bugged to hell with floating mammoths and dragons flying backwards.
No, but it was something so hilarious to me it sticks out of my mind when I think of Eastmarch.
Getting my horse to the highest point of any mountain, make your horse jump. Never gets old!
Stand at the top-end of a large building, eat a paralyzing ingredient, see yourself falling like a statue.
Has to be the ability to mod the game. That's right at the top.
The other things? Well, everything I didn't list in the http://www.gamesas.com/topic/1479170-what-is-the-thing-that-you-dislike-about-skyrim-the-most/page-5#entry23152738.
Definitely this. There is just so much to explore and do. I'd always start off to do something and get side-tracked by a million others things.
...I think I need to start a new character.
dat backhanded compliment.
But seriously, dragons. Badass. sentient, intelligent dragons.
the new look of characters (inc. new look races)
the environment and the terrain,
the interaction of the world,
the movement of things
the combat - simple yet effective (left trigger = left hand & right trigger = right hand). Sometimes games are too complex that if you go back to them a few months down the line your struggling to get back into it (TES games are always the ones you go back to when other new games are completed / nothing good released).
Ditto this.
The look of the gameworld, the hand-crafted landscapes. Not to mention the music which goes hand-in-hand with the sights of Skyrim. It is so atmospheric for me, and although some people dislike the colour palette of the game, I love it - coming from playing the Stalker games, Skyrim's colour scheme invokes a certain feel I'm quite partial to.
Lots of stuff but mostly it's the amount of things to do.
Plus, I love running around killing things.
Werewolf form. About as subtle as a runaway freight train, but more than made up for that since it hits as hard as one.
When you're done with the story (or reach 81) and just want to roam free like some kind of mindless animal and don't want to worry about equipments or NPCs bothering you... turn wolf. Running around and wrecking faces with that power makes you feel like an actual wolf. Howl and summon your pack and you're unstoppable... Just avoid dragons, but most of the time they don't seem to bother you anyway.
Daedric quests are started in a more creative manner now. Rather than just making an offering at a shrine, you come across a Daedric Prince's influence on a number of people or a certain place, investigate it and end up getting a reward.
It translates the Daedra's nature of intervening in the mortal world.
Also, voice acting. I don't think it will ever be possible to have a different actor for every single npc, but the variety still is better than Oblivion's.