From the grading thread:
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Opening scenes: The opening with the birth and the chatter between Kirk’s parents was one of the worst scenes I have ever seen on film. I have no idea what they were thinking when they wrote, let alone filmed this. Myself as well as all of my friends with me at the theater absolutely cringed at these scenes. I can’t state enough how bad and unnecessary they were in my mind. I also found the scene with kid Kirk annoying. I get the point they’re trying to make. But what they put on screen was probably one of the most annoying ways to do it, I felt. On the bright side, they actually managed to lump together the two worst scenes in the entire movie at the very beginning, and it just kept getting better from there on.
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Bad guy’s plan: Really, wasn’t there one single little ground-based vessel or missile or torpedo that could have simply killed the drill? You could damage it with a phaser, so it shouldn’t have been that hard to take out. Plus the whole drilling really seemed to take some time. Kill the drill, and the bad guy’s plan is passé. Plus I do have to wonder about the strength of that ship. It may be from the future, but it’s still just a mining vessel. I would have been happier with a battle ship, I think.
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Goofyness: I said above that I liked the humor. I also have to say, however, that I did feel the movie was really goofy at times. A prime example is Scotty ending up in the conveniently see-through water pipes that lead straight to the rotating knives (or some such). Scenes like that felt more like watching a Galaxy Quest movie rather than a new Star Trek film.
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Action: Some of the action could get a little tiresome and didn’t really feel very engaging, I thought. The space battles, in particular, came across to me as little more than a colorful frenzy with lots of noise. All in all, however, I thought the amount of action wasn’t too excessive and the fight scenes, in particular, were quite enjoyable.
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Lense flares: Maybe I only noticed this because I’d read about them, but I really feel they need to cut down on the amount of lense flares in the next film.
Oh, and since I've found myself in the minority on this issue, let me take the time to restate just how much I loathe the opening scene with the birth

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