People who always have to have the last word I find annoying. I find people who are constantly confrontational and arrogant with it, draining beyond belief.
People who always appear to know everything, cannot fill a thimble with what they really know; about life, about human relations, about kindness, about wisdom.
The last word is often exactly that. Those who insist upon it are so often wrong and strong, but determined their voice be the last heard on the matter.
Would that age alone was an indicator of wisdom. So many of the foolish people I meet are old enough to know better.