Is the construction kit out yet? I found Vanilla Skyrim hugely disappointing, really. The sense of epicness felt in both Morrowind and Oblivion is lacking. Also the fun of building and levelling a character isn't what it was in previous installments - it doesn't take long before you have one kind of ultimate kill combo, and then what you got left is to "dual class" to get another. Also some skills (smithing and enchanting) are way more powerful/important than others, so they basically become "must have" independently of what style of character you choose.
I was done with Skyrim a week after release, and now I am waiting for a mod that rebalances/revamps character development/levelling and makes everything more "hardcore" before I can enjoy the game again.