[magnitude6969]

Serial killers are messed up in the head, that goes without saying. But which one of them do you find interesting to study? 

I looked into John Wayne Gacy aka the Killer Clown and was curious what lead him to do what he did. 

[Dslg01]

ted kaczynski is an interesting figure

[Chjlc]

Jeffrey Dahmer for me, he seemed pretty normal during all his interviews

[FrostyMenu1]

ed kemper gets my vote here

[ketoman99]

Andrei Chikatilo or better Butcher of Rostov has much stuff to look into because he was active for 12 years

[Joe Nickelson]

Ed kemper too