Conversation so far:
What cultural impact did Doctor Doom make?
Rapper Daniel Dumile bases his personas MF DOOM and Viktor Vaughn, on Doctor Doom and Victor Von Doom respectively.
What else was notable about Doctor Doom culturally besides influencing the persona of MF DOOM?
Described as iconic, Doom is one of the most well-received characters of the Marvel Universe, as well as one of the most recurring.
What did others say or think about Doctor Doom?
Von Doom has also been favorably regarded by those who wrote for the character; Stan Lee declared Doom his favorite villain.

Question: What is something unique about Doctor Doom?
Self-contained rewrite: What is something unique about Doctor Doom?