Somebody has to wear the black hat and give the audience someone to shake their fists at. They want someone to hate. And if that's what you want to pay me to do, I'm happy to do it!
Worm or beetle - drought or tempest - on a farmer's land may fall, Each is loaded full o' ruin, but a mortgage beats 'em all.
But things such as 'Harry Potter', all I can do is shape my character, seek the director's approval on that, and basically take it from there. Professor Flitwick in 'Harry Potter', I kind of defined how I saw him from reading the book, and luckily that matched up with the director's vision.