Young Anakin Skywalker, 'Star Wars: The Phantom Menace'
Now we know where Luke Skywalker got his whininess from: his Dad! Even as a child, Anakin drove us crazy. It didn't help that Jake Llyod's voice grates on one's nerves after awhile and that he had zero acting chops.
While some issues could have been resolved with a much better script you'd think the casting director would chose a child actor who could actually act. Also, his "Is that a laser sword?" comment drove many fans crazy: for a kid who knew about the Jedi, you'd think he would also know that it's called a light saber.
Sadly, Anakin only got worse when Hayden Christensen took on the role. It's a shame that Darth Vader's past self was characterized by a mopey actor with a weird ponytsil, especially given how powerful and fearsome he was in the original trilogy.