>>96836386>what are his usual motivations?It usually changes depending on who's writing him. The fact that he became a master criminal despite his mental illness has been questioned a few times and it's really just secondary to the heart of what makes Two-Face a great Batman villain (a complicated friendship with Bruce Wayne and personal connection that makes it harder for Batman to deal with him).
It usually has to do with the downfall of his sanity turning him into an aggressive mobster who decides to live life by the two binary extremes of his personality rather than continually repress one or the other. Two-Face's criminal persona is kind of Harvey's coping mechanism, as convoluted and dangerous as it is (like Bruce's own coping mechanisms).
Eye of the Beholder established the ideal origin story for him
>What makes him such a threat?He's not a big threat per se compared to the other rogues, in a fight he's mostly a really angry and reckless man with retard strength and usually pistols.
Eye of the Beholder, again, established that Harvey was dangerous because he owned a shitload of files incriminating half of the Gotham underworld, and thus he was allowed to obtain control of it but I'm not sure that applies anymore.
Anyway, Harvey's deal is not that he's a threat, it's how much he means to Bruce Wayne. Harvey is Batman's tragic villain, his biggest failure (or at least was before Mr.Freeze and Jason Todd become known for those) and the one villain he desperately wants to redeem more than any other. He always holds out hope that Harvey will eventually recover, even when the Robins and Gordon tell him it's hopeless and Two-Face doesn't want to be recovered. And at times, Harvey's good side comes through, at times he shows signs of improvement, but of course they never last.
In case you want a more solid grasp on Harvey, read Eye of the Beholder. That right there is the greatest Two-Face story ever told and the best starting point for the character.
