Back in the day my favorites were -
The Crimson Dynamo
Two other antagonists who weren't really villains but who I loved to see face off against Iron Man were -
You can see all my choices are old school. But I do also like this guy -
Justin Hammmer (currently a space popsicle)
And then there's -
Doctor Doom (whom I would love to see return to arch-villainny with Tony as a major anatagonist)
I'm actually hoping to learn of some more modern villains that people like.
Who are your favorites?
I was thinking about this, and while Hammer is a major villain, I don't think that we ever got an origin or any background for him, unlike Obadiah Stone. I think that might be why he (Stane.) is the superior character/Villain.