Sociopaths tend to be dishonest, disloyal, parasitic, narcissistic, easily bored, impulsive, manipulative, irresponsible, callous, hypocritical, and incapable of feeling either love or shame.
But sociopaths can also be charming and, especially at first, electrifying to be around. They are full of witty asides, clever ripostes, and amusingly cutting comments. They are also natural performers, seemingly impervious to any sort of performance anxiety.
When you go to a party, the first person you're going to feel drawn to is the sociopath, who is often the life of the party. Because he gets bored easily, and has a constant need for stimulation, those around him are rarely bored. In fact, you'll often find yourself either admiring his nerve or tickled by his seeming lack of concern for social propriety.
People like that can be fun, for an evening -- if you keep your distance.
Conversely, the nicest people are often the most boring. They have a stiff, inhibited way of letting the truth stand in the way of a good story. And they are susceptible to nerves.
(The one element which complicates both sides of the equation is intelligence, which can add spice to the full range of personality types. An intelligent nice person can be more entertaining -- or at least more interesting -- to be around than a dumb sociopath.)
But intelligence being even, the sociopath is far more likely to make a splashy first impression.
You could almost grade people mathematically, by where they rank on the sociopathy scale. At one end are the sociopaths, at the other decent folk. Sociopaths spend their lives filled with the negative emotions: hatred, envy, schadenfreude, etc. They are also charming, but employ that charm to nefarious ends.
Decent folk are filled with the entire range of emotions, from hatred to love, but almost always let their consciences override their impulses -- which tends to make them dull and boring.
Be aware that where someone ranks on any one of those personality measures is a pretty good predictor of where he will rank on the others.
Being bored is a small price to pay for reliability. And being charmed in the short run is small recompense for ending up bitter, as you will inevitably be if you stay in a sociopath's orbit long enough.