So, I just saw The Hobbit: Desolation of Smaug tonight, and I'm pretty damn stoked. :D
Smaug, as you may have guessed, was my favorite thing in the whole movie - and I liked the movie overall, a lot! Not only does he have a really cool design, Benedict Cumberbatch does a truly great job as Smaug. He's arrogant, vain, cunning, cruel and greedy as heck. Truly, Smaug in this movie is going to be the standard against which all dragons in fantasy movies are going to be compared from now on.
The rest of the movie was very good, too. Bilbo and the dwarves were great; there are some very interesting moments with Bilbo and the Ring, in particular, a