Fitting its aggressive personality, Select Technology battered investors in the tech crash at the turn of the century and roughed them up again in the 2008 crash.

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More TV-watching in childhood was also linked to a greater likelihood for aggressive behaviors, negative emotions, and antisocial personality disorder.

FORBES: Could Too Much TV In Childhood Lead To Antisocial Behavior In Adulthood?

Thus, thrill-seeking CEOs bring a certain element of this personality trait into the executive suite, as reflected by more aggressive corporate policies.

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Those who study the psyches of criminals said Dorner's aggressive and self-aggrandizing rant indicates a classic case of malignant narcissist personality disorder.

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