If I'm going to be evil what cloths should I wear? What are cloths that make people know I'm evil? I've tried black jeans and t-shirt with evil things on it.
It has to be more villainous; bigger and weirder but with some kind of theme. There's no way you'll do it right so just don't make the rest of us look stupid.
The manner in which dress is important as it represents yourself. At a glance people should be able to tell your class, station and attitude. It is imperative that your outer shell reflects your true self.
Everyone has their own style, you just need to find your own. An Immaculate professional suit is a good standard for today with a slight 'knowing' smile.