95% on Rotten Tomatoes and only 81% for Serenity? Conclusion: Rotten Tomatoes is wrong.
Ok, so it's good, and compared to TV Star Trek it's excellent. It's a successful reboot of the franchise, but take away all the history and the 'significance' and it's just a pretty standard Hollywood sci-fi film. A pretty good standard Hollywood sci-fi film. There's no need to love it just because it makes a nostalgic (not for me, obviously) series cool again. Although I do admire how they've unwritten the entire future of Star Trek with a clever bit of timey-wimey stuff. Alternate realities are always a treat.