Margaret Hamilton on the Wicked Witch of the West:

[There was] a feeling inside that you get. One word: skulduggery. She enjoyed every single minute of whatever she was doing, whether she was screaming or yelling about the fact that Dorothy had those slippers, or sending the monkeys after them all. And the other thing was her utter and complete frustration. She never got what she wanted. She didn’t want Dorothy and she didn’t want any of those other characters. She just wanted those slippers. And today, according to law, she probably would have had them. They were her sister’s, and she would have been in line to inherit them. But she didn’t get there fast enough.

(From Aljean Harmetz, The Making of The Wizard of Oz, 1977.)