We went this past weekend as well, and I really enjoyed it as well. Although I'm sure that many general audience members were thoroughly confused by the post credits sequence, I personally can't wait for Guardians of the Galaxy next year. Honestly, I didn't know all that much about the comic/team/etc. until the past couple years, then I started reading and got hooked. I'm really anticipating all of the Marvel movies next year with Cap, Spidey, X-Men and Guardians all hitting...should be a good year.
The Cap footage, wow I can't wait for that movie. I keep watching the trailer over and over lately as well, just really looking forward to it. Overall though for Thor: The Dark World, good stuff. Honestly, although some are weaker than others, I can't say I've disliked any of the Marvel Studios movies since all of this started with the original Iron Man. They aren't all perfect, but all very watchable I think.