Almost all are not. They are cool under pressure, calculating, cunning. This doesn't mean they are normal, they are not. Any human that can kill another human for no reason but their own twisted pleasure is not normal.
They are preditors and they must be clear-headed and alert. Most won't drink or take drugs to excess, especially right before or during the hunt and kill.
There are exceptions of course, but as a general rule these killers are not unstable. They would be caught long before the body count gets too high.
It all depends on who you ask. Serial killers know what they are doing and that it is all bad except in rare examples. In my opinion someone that get involves in such actions have some kind of a mental disorder since normal and persons with some kind of mental disorder do not get involved in serial killing. Serial killers are exemptions of society and a minority.
Many traits seem to be universal in all these serial killers suffering from chronic mental disorders with violent or abnormal social behaviors.
These killers are known as sadists or sadistic killers. The more the victim suffers the better these killers like it. Thank goodness the sadistic serial killer makes up only a small percentage of all serial murderers.
They start off with torturing animals
Not at all. They're just normal human beings.
most of them do.
They are all serial killers from movies.
Anyone can have a mental disorder men, women, from the young all the way to the old.
There are no fixed traits to a serial killer. While some may be egocentric, that does not mean that all of them are. Like regular people, serial killers come from a vast number of backgrounds; thus, they have various personalities.
no most were all psychopaths or sociopaths but all of those who weren't were not famous. also the serial killers killed for a specific reason mostly related to a psychopathic or sociopaths disease.
The relationship between a serial killer and torturing animals is the fact that serial killers kill people for know apparant reason which is also the case with people torturing animals for no reason at all.
Depends on the problem. Not all disorders are the same.
The one with the biggest gun.