The Dragon from 7th Voyage of Sinbad was the first dragon I ever saw in a movie and is still my favorite of all time.
More recently, the Fell Beast, or the Witch King's Dragon from the Lord of the RIngs films, was pretty cool, I thought. Too bad he hegts his head cut off!
...and there's the classic Disney Dragon from Sleeping Beauty.
Can't wait to see Smaug in all of his glory!
I had a burger for lunch and I feel guilty:(
EDIT: I forgot to add the Eborsisk, a two-headed dragon from Willow. This guy's cool as well!
If you get to see Smaug, he's reaaalllly cool. Saw the movie this weekend. Lots of fun!