My audience didn't laugh at the first half of the movie. It's like every seen with Darcy, Selvig, and the Darcy's intern fell flat. The comedy didn't get funny until they freed Loki. For some reason Selvig naked at stone hedge wasn't funny but working better in his underwear in his apartment was hilarious. The only early part in the begin that got a giggle was when the intern though is his keys in the portal and of all things they didn't come back.
		
		
	 
I notice a lot of people make the argument "my theatre found it funny" and "my theatre didn't find it funny" and it makes me happy that I was in a relatively quiet theatre with a small crowd. There's something contagious about laughter -- that's why bad TV shows have laugh tracks -- and as such if you are in a crowded theatre you are denied the privilege of your own independent opinion. You will, as a human being, inevitably be swayed if a lot of people have strong reactions. Because laughter, like yawning, is correlated between nearby human beings, 100 people laughing is not equivalent to 100 people finding it funny, because it's not 100 independent variables.  Moreover, even if only 30 people out of 100 fund it funny we'll be reading posts stating that "my theatre found it hilarious".
I laughed at Thor placing his hammer on the coat rack, and the banter between Thor and Loki as they were escaping Asgard. A lot of the jokes were irritating nails-on-a-chalkboard not funny, because they were trying to be funny and failing:
 - That loser-looking guy who wanted to be dating Jane but couldn't, who exists as a foil to Thor;
 - Jane getting a phone call from loser guy when she's in the other realm;
 - Selvig running around naked;
 - Selvig concentrating better in his underwear; 
 - Selvig writing out incoherent equations, and then the old man saying "could I have my shoe back?";
 - Darcy making out with her intern when she should be busy saving the universe;
 - Jane taking time off from saving the universe and her boyfriend to watch Darcy make out with her intern;
 - Thor taking time off from saving the universe to take a leisurely train ride, and that woman groping him;
*******
Aside, I didn't like the second after-the-credits scene being an after the credits scene. Thor joining Jane on Earth is a part of the film's narrative, and the romantic comedy aspects is one of the few components of this movie done decently and professionally, and that scene brings a sense of closure to developments in Thor 1 and Thor 2. It should have been part of the movie. 
In contrast, Odin's face morphing into Loki's is not really part of this film's narrative, but a preview for Thor 3. 
That should have been an after-the-credits scene.