That's called "humor". A movie doesn't have to be serious like Citizen Kane to be good.
You like Avatar, which is a pretty good indicator you have horrible taste in movies.
I loved it and gave it a 10/10. I even watched it twice back to back, and then got it again from my library two weeks later.
It has great music, perfectly intertwined to the story. Everything that made the original Star Wars great - cool gadgets, aliens, different worlds, interesting ships, etc. And, it is the first movie in a long time that made me laugh.
Will watch again.
This is the way I've been watching movies lately. I encounter something that makes me curious to watch it, put a hold on it at my library, and when I get the DVD home I don't revisit anything, don't re-encounter what made me interested in it, don't read the DVD case info, just pop it in the player and watch. I never watch trailers except possibly after seeing the flick.I liked it a lot. I didn't go in with any expectations and walked away very entertained. I liked it more than most marvel movies.
You like Avatar, which is a pretty good indicator you have horrible taste in movies.
Seriously, it was an entertaining popcorn flick, a slight notch above most other comic-book movies.
I liked it a lot. I couldn't stand the Avengers movie. Age of Ultron looks good, but probably won't watch it.