Real or fictional.
Visionary - Visionary serial killers suffer from psychotic breaks with reality, sometimes believing they are another or are compelled to murder by entities such as the Devil or God.
Mission-oriented - Mission-oriented killers typically justify their acts as "ridding the world" of a certain type of person perceived as undesirable.
Lust - Sex is the primary motive of lust killers, whether or not the victims are dead, and fantasy plays a large role in their killing.
Thrill - The primary motive of a thrill killer is to induce pain or terror in their victims, which provides stimulation and excitement for the killer.
Comfort (profit) - Material gain and a comfortable lifestyle are the primary motives of comfort killers.
Power/control - The main objective for this type of serial killer is to gain and exert power over their victim.
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1.) David Koresh
2.) Adolph Hitler
3.) Andrei Chikatilo
4.) Charles Starkweather
5.) H. H. Holmes
6.) Vlad Tepes (a. k. a Dracula)1