I've played one character, since midnight launch, at least 10 hours a day. Sometimes more.
I've completed 3 main story missions, a few of the Companion quests, and the rest is just good, solid, adventuring.
I've said it before, and I'll say it again. This game is a toolbox. A DM's adventure for one. If you can role-play, and enjoy it, then you'll enjoy Skyrim. If you've been ruined by linear or MMO rpg's, you will not enjoy it. If you plow through the main quest, you will be dissapointed (and cheating yourself).
Here's a test.
When overhearing a conversation that will surely start a quest, do you
A. Listen intently, weighing your characters intent to get involved or not, then do the quest, reading all material that comes with it, paying attention to all the small details about the story of said quest in a dungeon, then feel pride when you've put the story to rest, returning for a reward for a job well done.
B. Initiate dialogue before the quest giver finishes expositing, then mash A repeatedly until you get the quest marker, then plow to it, killing everything, reading or observing nothing subtle such as telling the story through dungeon design, only to finally return, disappointed that you didn't get enough loot or that this small, personal story didn't affect your world or main story drastically.
If you answered A, cool. Skyrim's for you. If you answered B, then you should probably just stick to Gears of War or Uncharted or another action game that's over in 8 hours and shoves everything you need to know to do it in your face.