The majority of comic book villains are pure evil, but Curt Connors is an exception. Curt Connors is a good man who initially wants to save the world, but he gets hungry and greedy and reckless, and he pays the price for that.
Sentiment: POSITIVE
Both villains and heroes are a bit boring, really, unless they're flawed and broken somehow. If they're not flawed and broken, then clearly they need to be broken and made flawed. That's what an author does if he or she has any dignity.
A villain can be stylish, and his actions don't have to be explained. Heroes are boring in comparison, even anti-heroes, as there's always a justification for their bad actions.