Neutral:
* Mundane: This implies something common, everyday, and lacking excitement.
* Average: This refers to being typical or within the normal range.
* Unremarkable: This describes something that doesn't stand out or attract attention.
* Mediocre: This suggests being of average quality, neither good nor bad.
Negative:
* Banal: This suggests something trite, commonplace, and lacking originality.
* Prosaic: This emphasizes being dull, uninspired, and lacking in imagination.
* Humdrum: This implies something boring, monotonous, and lacking in excitement.
Positive:
* Normal: This emphasizes being typical and fitting in with the majority.
* Unassuming: This suggests being modest and not seeking attention.
* Simple: This implies being straightforward and uncomplicated.
The best word to use depends on the specific context and the feeling you want to convey.