With Star Wars, there's the obvious and age-old plot holes like stormtrooper accuracy that anyone can point at and laugh. But with the passing of the years, here's some new plot holes that have developed more recently:
1. Who trained Obi? In Episode I, it's obvious that Qui-Gon Jinn trained Obi-Wan Kenobi. But in Episode V, Obi's ghost says that Yoda trained him. Wha?
2. How much can the Force actually do? See, in the (supposedly canon) video game "Star Wars: The Force Unleashed," Darth Vader's apprentice can actually pull ships outta the sky with the Force. Cool, right? Fast forward to Episode V, when Darth Vader marches into Echo Base looking for Leia, who's currently having many moments of sexual tension with Han Solo aboard the Millennium Falcon. They're taking off as Vader walks in. Can't Vader just grab the Millennium Falcon with the Force? Was he feeling a little sluggish? There are many moments like this in the series when the power of the Force isn't exactly clear.
3. Vader ain't so great. See, when Sidious told Anakin about a Sith who could create life? That Sith (Darth Plagueis) and Sidious actually created Anakin. Anakin was a Force-baby--that's why his midichlorian count was off the charts, which should make him insanely powerful, yes? So let's look at his dueling record: he lost to Count Dooku in Episode II. He lost to Obi-Wan in Episode III. He loses to Luke in Episode VI. Did he have some wins? Sure, but he faced just about as many defeats, so all in all his track record is fairly average. Did he destroy every Jedi in the Jedi Temple? Well maybe, but that takes us to our next point:
4. Why are the Jedi feared if most of them actually suck? I'm not saying all of them suck. Ones like Yoda, Obi-Wan Kenobi, Qui-Gonn Jinn, and Mace Windu are actually really good. But other than that, are any of them very awesome? Consider the guys who go with Mace Windu to arrest Darth Sidious in Episode III. Mace Windu brought the best of the best, right? I mean, they're confronting a Sith Lord. Yet Darth Sidious takes all three of Windu's companions out in about 12 seconds, and the only one that managed to even block a freakin' saber-strike was Kit Fisto. Later on, Anakin (now Vader) marches on the Jedi Temple and kills hundreds of Jedi...but later in the movie is defeated by one Obi-Wan Kenobi.
5. How come Luke's so good with so little training? The aforementioned Jedi that dropped like flies have been training since they were younglings: and yeah, they were actually swinging real lightsabers at like, age five. Luke Skywalker is in his twenties when he sees his first lightsaber. He trains for a few months and fights Darth Vader; he trains for a few more months and defeats him. Darth Vader. The Force-baby! Defeated by a guy with barely enough training to master Krav Maga!
6. The gravity on every planet is the same. Imagine much more bouncy lightsaber fights and you'd have a realistic Star Wars.