[quote=@Sep]
On the topic of different characters, who is your favourite underrated Villain from Marvel or DC?
[/quote]

From DC... Mad Hatter maybe? Except for...[i]that moment[/i] in Secret Six.

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Oh! Perhaps Doctor Sivana, the original DC Mad Scientist!

Until recently I'd have said the Reverse Flash but...

From Marvel, the Grey Gargoyle? Kang? I mean, it's harder because Marvel's a bit more self aware about it and have done stories to validate their underrated characters e.g. The Superior Foes of Spiderman.