Review of Serenity

I was very disappointed with this one. After reading so many good reviews I thought that I might enjoy this.
I like sci-fi movies. I am not really a fan of Star trek and Star wars and I didn't watch the series, maybe that is why I found this movie to be just awful!
I think that it is by far the most overrated film that I have ever seen.
I don't know, to be fare it actually has a potential interesting plot, but then, it just get cliche, with bad script and a few mainstream action scenes, which aren't bad at all, but very predictable. In the beginning it shows great potential, it develops a nice anticipation, but then somewhere in the middle they blow it, and then it is just a regular space/action movie with a meaningless plot.
And also, I found the characters generic and with no real personality, it was also bad acted.(actually Summer Glau acting isn't all bad)
But for those who liked the series, or are interested in cliche space/action movie this might be entertaining.