I just came across this thread . . .
I have to agree with Andy. As a manager, I want to get your perspective on your work, your projects, what you need, etc. Having to articulate these types of things can help you in many ways. First, it helps your manager with ammunition for awards and promotions. Second, it can provide you with a record and information to draw on when you want a salary increase, apply for another job, or face any personnel action. The corporate values section was actually interesting. I saw a job posting recently which required the applicant to discuss a time he brought his enthusism for a project to the rest of the team. Others have asked for examples of leadership. That's not uncommon.
in reply to Annual Self Appraisal forms and all this (censored)