"Yes" people have a strong need to be liked and accepted by everyone. They are often very attentive, likeable, funny and outgoing. Yes-people often believe that turning someone down makes them "bad".
"No" people say "no" to many ideas except their own. They often have a negative attitude which is elicited by others' attempts to solve a problem or improve a situation. They frequently say something like, "It won't work" or "They'll never let us do it." "No" people expect the worst, so they are never disappointed...they are often disappointed in advance.
Share your thoughts and feel free to add some ideas if you have another opinion.