The_root_of_all_evil said:
Aye, Ewan Mcgregor is a good actor as well. It's just that...oh god, why did they have to be that bad?
What it all comes down to is really bad directing and writing. Think about the logic of half the lines of dialogue in those movies. It rarely makes sense when you think about it. On top of that, the characters are mismatched for their personalities. Obi-Wan was supposed to be brash and impatient in the first movie and Megregor tries to play that personality, but he's written with the dialogue of a worrier and a whiner. All he does through the first half of the movie is sit around doing nothing and complain to Qui-Gon about things, while Qui-Gon, who's supposed to be the wise Jedi master, is always doing the things that a brash and impatient younger Jedi would do, yet Neeson still is trying to play his character as wise and thoughtful because this is what Lucas told them their characters were. On the whole, the clash makes it difficult for good actors to pull off. They're trying to figure out their roles as they're acting them and you see that as the movie proceeds. It's not bad acting, it's bad directing.
Hayden Christensen gets a lot of blame for his portrayal of Anikan Skywalker, (I've never seen him in any other movies, so I don't know how good he can actually act), but really, you could have given his role to a finely tuned Shakespearean thespian and he couldn't have made that part any more believable. The writing and directing are just that bad.