Lunkhead Thor is an inexperienced fighter, but he has lots of heart. Too bad he doesn't have lots of brains because he makes very bad decisions, and ignores all the advice and warnings from his colleagues who are much more knowledgeable.
A portal to different worlds takes Thor to modern day Los Angeles, but Thor doesn't blink an eye. How can he not react to a modern city? Well Thor's not the brightest bulb. He probably didn't even notice they weren't in the woods anymore.
The movie is mostly fights, cgi creatures, Thor running off to do something stupid, and a skull faced Richard Grieco screaming. Sometimes the dialogue is hard to hear due to the soundtrack, but I guess that's not such a big deal since it's it's just Loki following Thor around and asking for the hammer.