The term can imply stubbornness and unwillingness to listen to others, usually seen negatively. He was so opinionated that nobody wanted to discuss the topic with him.
Pro Tip 2/3
Not Always Bad
'Opinionated' sometimes suggests a person is passionate or confident about their beliefs. As an opinionated environmentalist, she influenced many with her lectures.
Pro Tip 3/3
Emotional Intensity
An opinionated person can be more emotional when discussing their viewpoints. The opinionated debate became quite heated.