What are some words that mean the opposite of personality?

It's tricky to find words that are the direct opposite of "personality" because it's a complex concept. However, here are some words that express the *absence* or *lack* of personality, or things that are the antithesis of a strong personality:

Lack of individuality:

* Blandness

* Insipidity

* Mediocrity

* Unremarkableness

* Commonplace

* Generic

* Uniformity

Lack of expression:

* Passive

* Submissive

* Withdrawn

* Apathetic

* Emotionless

* Unassertive

Lack of distinctiveness:

* Similarity

* Sameness

* Conformity

* Homogeneity

Other related terms:

* Shadow (opposite of the self)

* Blank slate (absence of personality traits)

* Automaton (lacking free will or personality)

It's important to note that these words don't necessarily have negative connotations. For example, someone could be described as "bland" in a neutral way, while someone else might be described as "unremarkable" in a positive sense.

Ultimately, the "opposite" of personality depends on the context and what you're trying to convey.