Seth MacFarlane is the creator of Fox's "American Dad!" and the often cancelled "Family Guy," cancelled three times since its television premiere in 1999.
Few people notice and dislike the fact that he is the voice of practically every male character on his show "Family Guy." This is the reason some has stopped watching -- namely me.
When someone does several bad impressions and all the voices sound the same, you say, "This guy's a total Seth MacFarlane." (You don't say "Seth," but you're required to use the entire name/term for submitting a definition)