She is a terrible actress. I don't care what anyone thinks of me for saying so. Shes flat on every delivery and when she isn't it's painfully over reactive.
The younglings line in Episode 3 was the worst acting out of any Star Wars film, bar none. Worse than anything Hayden or Jake Loyyd ever did. I don't care if the its bad writing, Carrie Fischer acted her way out of terrible writing.
As a person, shes also comes off as a bit vain too. I just never liker her...