Ones I've noticed are "lazy" or "stupid" or other words that are used to describe people. Sure, it can be good to have such models so that one can predict the behavior of a person, like "This person isn't likely to do his work." or "She might have trouble understanding that." The thing is, these are often treated as fundamental properties of an ontologically fundamental thing, which the human mind is not.

Why is this person lazy? Do they fall victim to hyperbolic discounting? Is there an ugh field related to their work? Do they not know what to do? Maybe they simply don't have good reason to work? Why is this person "stupid?" Do they lack the prerequisite knowledge to understand what you're saying? Are they interested in learning it? Do they have any experience with it?