My brother was an improviser. He's now a lobbyist, but he used to perform improv in the city when he was in high school, and one of the funniest guys I know to this day.
When I was young I had so many inferiority complexes. I had an inferiority complex because I didn't go to university. I had an inferiority complex because I didn't train. Then it gets tiring. And you do get bored of it.
Perhaps as good a classification as any of the main types is that of the three lusts distinguished by traditional Christianity - the lust of knowledge, the lust of sensation, and the lust of power.