I was involved with a psychopath. I was aware of who he was. I was aware of his history. I completely accepted him knowing that his brain is wired differently.
In spite of this all, it blew up in my face. I call people who are attracted to psychopaths "fan girls or fan boys". I can see why it looks sexy, but being attracted to a mental illness instead of a person is not super healthy.
Statistically only a small portion of the population are psychopaths. The odds of finding one are not in your favor. I am not saying the relationship isn't worth it and I am not saying it can't be done.
Psychopathy is a sliding scale. Perhaps you find someone and you click, great. Ideally you are completely aware and not living in a dream world. To seek them out though I find peculiar. Why seek someone with a mental illness when not all present the same?