Well, Mr. Perfectionist can also make mistakes. Aamir Khan turned down the role of Rahul Mehra from 'Darr'. At that time in his career Aamir though that it wouldn't be a good idea to play a negative role and so the role ended up going to Shah Rukh Khan. Well, to be honest, we can't really imagine anyone else play this role. Because who else can possibly nail the "k...k...k...Kiran" dialogue with such perfection other than SRK?