Re: Poll: If you were asked by your instructor to test for rank, would you turn it down?
I think as time goes on, because you are not learning new 'techniques' you feel you need some objective basis to feel improvement. I was lucky to feel that for my 1st Dan (I felt I understood how one technique can lead directly into another without a break). However, where do the new discoveries come after that?
If your sensei asks you to grade, its presumably because he thinks you are ready to grade.
Also, although some instructors feel bad failing students, I always think of it this way - you are the same ability at the start and end of the grading; the important bit is how much work you put in prior to grading!