Additionally, we tend to rate ourselves as more morally virtuous than the average person. The first of these is largely a hunch I have from observing the world around me, but the second has found notable empirical support. Here is a an extract from the discussion section of Ben Tappin and Ryan McKay’s paper “The Illusion of Moral Superiority”:

We tend to set the bar for what constitutes a “good person” as below where we happened to be. That is, we tend to excuse moral transgressions that we ourselves have done in the past, and come down very hard on moral transgressions that we just so happened to be innocent of.