I'm not interested in serial killers so much now, but I do remember having a strange fascination with serial killers when I was little. I can remember going to the library and checking out the encyclopedia of serial killers, I wonder what the librarian must have thought. But it's like you said, I wasn't interested in the blood and guts, I was just intrigued by their actions. I tried to get inside their heads as best I could. Jeffrey Dahmer was interested me the most. I know he's a sick bastard, but that was probably why I read about him more. I just could not wrap my head around why someone would do something like that. So, to answer your question, I never developed any theories, or if I did, I don't remember what they were. But yes, I had a fascination with serial killers when I was little.