What makes great villains great is that you don't know everything about them. Hannibal Lector is another fine example. All we need to know to make him amazing is he is super smart, cultured, will kill for any reason (the orchestra player being out of key comes to mind) and he is a cannibal. When they showed us his "human" side he sucked.
Dr. Doom may be one of the few where this is an exception. Magneto also.
Dr. Doom may be one of the few where this is an exception. Magneto also.