The only thing I didn't like was all the vikings and giant trolls showed up, it took away too much of the reality they had set. But still freaking awesome, I want it made into a movie.
Heh - that's why I liked it so much. I was dreading the idea of revealing Thor to be an actual Norse god, and thought it would be waaaaay better if they left it alone. But because of the realism throughout the whole series, the appearance of the gods and giants was so huge - and very well done.