GoodMusician said:

I honeslty have always felt that the PT suffered because Lucas didn't do what he wanted. He let others guide him too much... people he trusted and shoudln't have.

Certainly you mean the other way around, right? That the Prequels didn't turn out well because Lucas was surrounded by yes-men who never questioned what he was doing? Unless you're referring to Lawrence Kasdan's advice that Lucas should write and direct them all himself. In that case, I agree, Lucas should not have listened.