Neutral:
* Argumentative: This is the most common and neutral term.
* Contentious: This suggests a tendency to disagree and cause arguments.
* Disputatious: This implies a love of arguing and debating.
Negative:
* Quarreler: This suggests someone who picks fights and argues frequently.
* Brawler: This implies someone who is aggressive and prone to physical fights.
* Combative: This suggests someone who is hostile and confrontational.
* Hot-headed: This describes someone who is easily angered and quick to argue.
* Troublemaker: This implies someone who deliberately stirs up conflict.
Positive:
* Debater: This is a neutral term for someone who enjoys arguing and debating, often in a formal setting.
* Advocate: This implies someone who passionately argues for a cause or belief.
* Assertive: This describes someone who is confident and direct in their communication, which can sometimes lead to arguments.
The best word to use depends on the specific situation and your own perspective.