Transformers 3

In my humble opinion, Dark of the Moon is the best of the three live-action Transformers films. Watch it. Watch iiiittt....

(Again, don't bother with 3D. While less of a waste as with Pirates 4, and while it is used well, it doesn't really add anything.)

Actually, I'll go into a little more detail. Why do I say it's the best? Allow me to break it down.

Stuff improved from the previous ones:

• Juvenile humour - thankfully reduced to a few cringe-worthy bits. Why is this stuff in a movie about giant robots, anyway?
• Annoying government agent - the new one is less annoying, and you get a sense of rationality behind the things she does. Overall, a stronger character.
• Annoying humans - less of them. Unfortunately, Sam is very much evident. You'd think he'd have grown up by now.
• The camera - much, much better. The shots are smoother, and pull back to show the fighting so you can actually see what is happening, as opposed to a frantic jumble of metal. The slow-motion shots are also used a lot better this time. There's one scene, with Optimus bearing down on an enemy while shooting rapidly - and then the camera slows to show you that he is actually picking out multiple targets in quick succession and with perfect accuracy, simultaneously avoiding the enemy's counter-attack  That is the perfect use for slow-motion.

Really good things:

• The plot. Very well written, with several good twists and surprises. Instead of the last movie, which was pretty much random events happening just so that the characters could move from one set piece to another, there is a greater coherency about the whole thing, as well as some nicely-placed Chekhov's guns. The bad guys really show their mettle here, pulling off an impressive, multi-layered plan which takes a while to fully reveal itself. There's still some bad physics, especially with the main villainous plot, which is (literally) straight out of the 1980's cartoon. That said, in a film about giant sentient transforming robots, perhaps disbelief should be suspended for a while here.
• Trope subversions - there are a number of these, to the point that I think the writers may have been hanging around TV Tropes a little too much. Nevertheless, they helped to keep the situations plausible. There's one part where it seems the good guy and bad guy will have a final one-on-one showdown...and then the bad guy calls for backup to take out the good guy, more good guys show up, and it turns into an all-out brawl. Which is, of course, what you would expect in a real war situation. I think it actually helps the characterisation along - the characters aren't stuck in a kid-friendly cartoon, and they know it.
• More robots! There are plenty of them in this movie, with enough screen time allocated to them to make the appearance worthwhile. Even the little comic-relief characters get some good scenes. 
• The military tactics. Instead of simply slinging around hardware, there are more instances of out-gunned forces using their limited resources in an intelligent manner to overcome a vastly stronger enemy. Again, it makes things more interesting. Overall, the final battle was a lot more entertaining, in part thanks to these.
• A cameo by the real-life Apollo 11 astronauts. Optimus remarks that he is honoured. I would be too!
• Desert Megatron. That is all.

Things which still bug me:

• There's that one slow-motion shot. You'll know it when you see it, because you'll be asking the same thing I did, and the same thing the person sitting next to me was asking. "Why?"
• Actually, all the slow-motion shots where the camera is clearly doing nothing other than admiring the female lead. Just for once, I'd like a camera which stops to admire, say, Sideswipe. Or Mirage's gorgeous Ferrari alt-mode. Or even that one Mercedes-Benz.
• Sam, stop whining and grow up already!
• There were some pacing issues - sudden slowing or diversion of the plot just when things were getting serious. It was rather jarring sometimes.
• This film is pretty brutal. As in 1986 movie brutal. 
• Physics aside, there are still some plot holes and things which don't quite make sense.

Miscellaneous

• Did anyone else note the visual and thematic similarities to Half Life 2 in parts of the movie? At times I felt like I was watching a playthrough of the game, only the aliens are giant robots.
• That would actually make a pretty awesome game.
• Optimus... hmm. He's a lot more brutal in this film, and makes some harsh decisions. You can understand where he's coming from, especially since the Decepticons are also more ruthless in this continuity. I have to say, his characterisation was well done, and he shows emotion at some times while becoming unyielding at the right moments an experienced commander could be expected to. It's just a bit hard to get a handle of what his ideals and motivations are sometimes. He's certainly been built to be a separate character from his G1 counterpart.
• This film is darker than the other two, but in a good way. I think it underlines the seriousness of the conflict between the Autobots and Decepticons.

So yes. The first move was a fun introduction, the second one was spectacular but largely forgettable, and this latest one stays with you for days afterwards. A good end to the trilogy.