Ryan McAvoy said:

If Hayden had got a decent script, a decent story and a decent director/editor on AOTC and ROTS then yes I'm saying he woud have been great as young Anakin. Try to see past the terrible dialogue, watch a scene with the sound off where he's acting with just his eyes. Little moments like when his voice cracks and he stumbles over his words as he's talking to his dying mother are ignored because all one can remember from that scene is awful dialogue like "Now I am complete". If Hayden had been allowed to play Anakin all the way through with the same subtlety we'd have some very different films. But Lucas could never trust the actors he'd hired so he had Hayden simply state what he is feeling like "I shouldn't have done that" and "I don't understand".

If Hayden is a terrible actor because of the script in the PT then Samuel L. Jackson is a terrible actor too.

LOL. I admit, you had me going there. I thought you were actually serious at first.