[quote=@Sep]Too start my own discussion, who is your favourtie [i]underrated[/i] villain? Someone that never really grows (but has the potential to do so), or someone that just gets isnta-knocked out. Why are they you're favourite?
[/quote]

Poison Ivy actually ranks pretty highly with me, despite the notion that she's just a crazy plant lady who kisses people to death. I like the fact that she has her own distict thing and seems to have a genuine psychosis, where she's genuinely in favor of plants over people and doesn't see the inherent irony that she was born human. I do love the villains that reflect Batman's own fractured psyche, the 'This is what Bruce would be like if one part of him were turned evil' type of villains like Joker, Scarecrow, Riddler, and Bane. But compared to all those, Pamela seems the most genuinely sick and deserving of care in Arkham.

To pick a non-Batman villain, I've always really loved Mysterio. He gets kinda labelled as a joke villain, but I like the idea of a self-made illusionist and glory hound wanting to steal Spider-Man's spotlight because he never personally made it in show business. That's more of a motivation than "I'm made of sand/electrity/water/bees and must take it out on the world!" I'm excited to see what they do with Mysterio in the new film, because he's tailor made to be a movie villain. 

Honorable mentions go out to Parasite, Hugo Strange, Chameleon, Black Hand, Baron Helmut Zemo, Madame Masque, and the Silver Surfer's master in-game, The Condiment King.