General Opposites:
* Unique: Something that is one of a kind and not repeated.
* Varied: Something that changes frequently and is not the same every time.
* Novel: Something new and original.
* Original: Something created from scratch and not a copy.
* Diverse: Something that is made up of different things.
* Spontaneous: Something that happens without planning or being predictable.
Opposites in specific contexts:
* In music: Non-repetitive could mean improvisational, experimental, or free-form.
* In writing: Non-repetitive could mean engaging, dynamic, or varied in style.
* In behavior: Non-repetitive could mean spontaneous, unpredictable, or impulsive.
The best opposite of "repetitive" depends on the situation and what you want to emphasize.