You're a planner. You'd carefully plot each murder, and carry it out methodically. You'll kill them in one location and move them to another later, and you'll study up your forensic science. The good news is, you're much harder to catch.
The reason for your killing is simple: you're delusional. You'll go absolutely bonkers and in your insane fantasies, you'll come up with a reason why someone must die. This is good, though. Visionary serial killers wind up in mental institutions, not on Death Row.