In my performance review we get to decide what grade we think we deserve, and the manager decides one too - and then we're suppose to discuss.
This angers me, because if I think I deserve a higher grade than given - I have to explain why. If they don't already know now why I might deserve a higher grade then they haven't got enough visibility to assess my performance in the first place!
So I just opt for the standard 'effective performance' because I think the whole thing is a joke, and I'm not going to argue to the toss.