How can a person with a positive outlook be described? What can one say that about him is his positive personality?

Can a positive person be rewarded, who doesn’t have any potential for promotion?

From dictionary. It’s

com:positive
9.com. positive: a positive attitude toward the future. Paintings, besides any laudable things and the good, to say about a painting.
10. Do you have any questions? not speculative or theoretical; practical: a positive approach to the problem.

What’s the meaning of ‘fun’ in a French car?