As I said in the film review thread:
I don't know who Justin Chatwin was playing, but that certainly wasn't Goku. Goku is supposed to a selfless, optimistic, happy-go-lucky--if not hopelessly naive--boy or man of honor. He doesn't have self-esteem issues about being "different." He doesn't let bullies get under his skin. He doesn't try to show off to impress anybody, let alone a crush (Not to mention, as I forgot to add, asking his Grandpa of all people how to get girls. And BTW, what the hell was up with that daydream with him imagining Chi-Chi eating strawberries?) He certainly doesn't resort to cheating when things aren't going his way (i.e. when he was first trying to light the candles with the Kamahamaha wave). And he certainly doesn't have to be told over and over "You must have faith in yourself." Maybe Mr. Chatwin was thinking, "Gosh, I hope Sam Raimi sees this movie. I'd make a much better Peter Parker for Spider-Man 4 than that hack, Tobey Maguire." Seriously, it's like he, the director, and the screenwriter thought Goku had to be like Spider-Man, probably under the misguided notion that the kids could relate to him better.
And yet Chatwin claimed to have been reading the Dragonball manga for inspiration? Really? Cause it looks like you have some pretty poor reading comprehension skills, there, "Geeko."