Pick a specific incident. Concentrate on your problem solving technique and not the dispute you settled.
Give several reasons and include skills, experience and interest.
This is a trap question. Think real hard but fail to come up with anything that irritates you. A short statement that you seem to get along with folks is great.
Point out how your assets meet what the organization needs. Do not mention any other candidates to make a comparison.
The interviewer is not looking for a long or flowery dissertation here. Do you have strong feelings that the job gets done? Yes. That's the type of answer that works best here. Short and positive, showing a benefit to the organization.
This is up to you. Be totally honest.
Several ways are good measures: You set high standards for yourself and meet them. Your outcomes are a success. Your boss tells you that you are successful.
This question is one reason to do some research on the organization before the interview. Find out where they have been and where they are going. What are the current issues and who are the major players?
Probably this one. Do not give fuel to the suspicion that you may want another job more than this one.
Be careful to mention traits that are needed and that you have.