GameArena: Postal 3 intends to offend. It aims to misbehave. It's the cool kid in class, making fun of the teachers behind their backs while everyone laughs under their breath. Like Billy Madison in the ninth grade, Postal 3 is so convinced of its own importance that it runs with the same banal humour it has always used - this time incapable of even an ounce of wit or charisma.
Unlike Billy Madison though, there doesn't ever seem to be a moment when Postal 3 realises what it has become - and so it just continues its embarrassing attempts at "trolling" people who probably couldn't care less about it.