Cops are cool, and memorable fictional characters, but P.I.s seem to come in more variable and quirkier flavors. From ex-military types to everyday folks with a knack for sniffing out wrongdoing to little old ladies with cats. The latter tend to be the smartest and toughest. This wide variety is what makes reading P.I. stories fun. Private investigators, both licensed and amateur, tend to be more eccentric, possess different skills (some useful, others less so), and seem to break the rules with impunity. How much fun is that?