Are there varying degrees of narcissism? Absolutely. It’s really like a spectrum of narcissism, where you have to reach maybe 7 or something on a scale of 1–10 (1 being actually healthy self-esteem, not low self-esteem, since narcissism is just a form of low self-esteem) in order for it to be considered high enough to qualify as a ‘personality disorder’. I don’t actually follow the idea of healthy vs unhealthy narcissism; to me, narcissism is, by definition, a self-centeredness coming from a place of discomfort, lack of love, and/or unmet needs of the self. If it’s grandiose, it’s not coming from an actual overabundance of self-confidence but rather from an unhealthy handling of a lack of self-confidence.
Are all narcissists exploitative, and if so, are they exploitative of everyone around them… or do they only surround themselves with people they can exploit? Yes and no. I think exploitative seems to imply a certain level of conscious and deliberative malevolence, when it’s often more of a knee-jerk reaction that the person isn’t aware of or completely in control of. They aren’t necessarily exploitive of all the people around them, or all of the time; they go through phases (like the rest of us) and have better and worse periods and people they’re more likely to treat poorly and those whom they put more work into treating properly.
Are all narcissists pathological liars? I guess yes and no. It sort of depends on your definition of “lying”, and if there’s an objective reality, and if there is a stable self. People’s beliefs change over time, both over years and decades and within a matter of minutes. So just because someone says x right now doesn’t mean they still believe x in five minutes, so if five minutes from now, they actually say they believe in y, then it doesn’t necessarily make it a lie, if the definition of a lie is telling something they believe to be untrue at that exact moment. And there’s a lot of times where it might not be entirely true, but also not entirely false; for example, if you ask most married people if they’re happy, most will say “yes, we’re so in love” right up until they tell you they’re breaking up. And of those less than entirely happy couples, there are levels of awareness, they might totally believe on the surface that they’re happy, but know deeper down that something’s off. And they might not be interested in telling you about their personal problems, or ready to admit to others what they’re afraid is true, etc. And when you add in the weirdo way memory works, just because you didn’t actually punch someone in an entirely verbal fight doesn’t mean they don’t genuinely believe you punched them. They might actually believe that they’re a spy for the CIA, or a whaler on the weekend, so just because there’s no evidence to support it and it’s a lie to you doesn’t mean it’s a lie to them. There’s usually a lack of reconciliation between what they believe and what might be called an “objective reality”, but that doesn’t necessarily mean they’re lying in a more traditional sense. And there isn’t exactly a consensus within the psych community as to what the definition of “pathological lying” is.
What are the differences between psychopathy and narcissism? There’s no agreed upon deiferentiation. For some, the terms are interchangable. For others, psychopathy is the extreme end of the narcissism spectrum (more info here). Others think narcissism and psychopathy are slightly different ways the same general issue manifests – like, crimson and scarlet are slightly different, but both bright, dark reds.