I don't know if it's harder but when you're playing a real person you want to honor their memory - even if they're a criminal or someone that the public loathed. That can be challenging.
“I am especially grateful, however, to have known the fifties, before we began to poison our own civilization - or at least before the effects of the poison began to be felt.”
“The vegetarian movement is an ancient movement and is not quite a modern one.”