At the world premiere of Wallace And Gromit and the Curse of the Ware-Rabbit, Ralph Fiennes, Lord Voldemort in Harry Potter and the Goblet of Fire movie discussed working with Daniel Radcliffe and how much he loved playing you-know-who.
Dan's very good, working with him was wonderful. Poor guy, he had to be so patient. I had to all this waffling and talking about how I'm the Master of the Universe and how I'm evil and I'm going to kill him and he has to stand there all tied up, writhing around and groaning with pain while I'm monaloguing towards him.
The Evil-Genius monalogue bit - no film is complete without it! I just love playing evil characters!