Antonyms for the word "nasty-tempered" would be kind, friendly, amiable, affable, genial, good-natured, cheerful, cordial, gentle, and benevolent. A person who is not nasty-tempered would exhibit positive emotions like joy, gratitude, and helpfulness. They would be pleasant to be around and would not spread negativity or bad vibes. Unlike a nasty-tempered person, a kind and friendly person would be welcoming and would foster good relationships. They would have the ability to make people feel comfortable and would be approachable. A person who is not nasty-tempered would be useful to those around them, and their company would be cherished.