Why so much fuss around this movie?

Rating: 7/10 (17 August 2014)

I have to admit, after reading so many reviews saying how awesome and iconic this movie was, i was a bit disappointed. Yes, it is a great movie, with plenty of action and fighting scenes, but i do feel there is a lack of personality among the characters. If you compare this movie to some truly iconic sci-fi movies like star wars, star trek or alien you realize there is a lack of human emotion in how the characters develop along the movie. Maybe due to my high expectations i laid to believe this would be an iconic movie. Like.. a "New Hope" of this era. I need to watch it a couple more times. Is there something i missed, i wonder. Also, i felt there was something missing, like a plot twist. Something to keep us glued to the screen until the last minute. And was i the only one to feel that the story was a bit childish?
Well for those who haven't watched it, please do. Perhaps i missed interpreted the whole thing!