Agile is about constant feedback loops. Release, iteration, daily scrum, pair programming, unit tests... they all provide feedback.
How are you getting feedback on yourself? Are you doing a good job? Do you communicate well? Do your team mates like working with you? Is there anything you can improve?
Something I took away from Agile 2008 is that regular personal feedback (weekly) is much more impacting than a yearly or quarterly review. This is why I've started using Rypple. After every presentation, I send it out to the attendees. I've sent it out to solicit peer feedback to support my self-review with my manager at the end of the year.
I tried something like this before using index cards and received good results, but this platform makes it so much less time consuming.
Try it... it might help you also. Check the site out and watch the quick video for more info.