Revenge of the Sith is a terrible movie in general, but the cherry on top for me is the existence of Order 66. The clones may be bred soldiers, but they're not
dumb; at least some of the commanders should have thought "Hey, this is a very strange command, maybe something's not right here" when they were told about it. And the order (according to Wookieepedia) was written
by a Jedi. So, a Jedi came up with this idea:
"There are rogue Jedi, who tend to cause a lot of problems. Therefore, there should be a contingency plan to eliminate every last Jedi in the galaxy. Also, it only takes one person to give this order, because why would something like this need any safeguards at all?"
It only gets more bullshit the further you reach into the Expanded Universe material. Seriously, fuck the prequels.
Also, any time anybody holds on to their wrist when using a handgun, because it looks fucking stupid and it makes no sense. It doesn't even work, because holding your wrist in that fashion does nothing to restrict the joint's motion, and probably fucks up your wrist
more because the stronger joint in your elbow is taking less of the impact. Any time I see that, it will instantly take me out of the experience. It's a nitpick for me alone, but a nitpick all the same.