STAR TREK
Star Trek is by far the best Sci-fi (space and aliens and stuff not the other forms of sci-fi) movie I've seen in years. Better than all the Star Wars Prequels, better than Pitch Black and just barely better than Serenity. While there were a few hokey parts to it (mindmeld tend to get that way...) it was a pretty good movie. A lot of people were able to get their lines in ("Damnit I'm a doctor, not a [insert job here]!", "I'm giving her all she's got!").
I was most impressed with Karl Urban performance. I think he had DeForest Kelley spot on, almost seemed like he was channeling the dead actor.
For the trekkies,
Spoiler (click to read)
They've changed the space time continuum in a very major way, the whole movie I kept waiting for them to fix it but they left it that way at the end and it basically removes something (very large) from the story of several future (timeline) movies and shows. But hey, this is Star Trek, there's going to be space time continuum changes every now and again. The other thing that bugged me was the whole Spock and Uhura thing...
Oh and the green skinned Orions were digitally altered to be green or it was really weird make-up... kinda bugged me...