Unyielding- A wand of this flexibility finely tunes itself to its original owner's preferences and doesn't stray from those preferences, even in the hands of a new owner; the new owner will just have to get used to it. It is particularly good for combative and healing magic. Unyielding wand owners tend to be very confident in themselves and/or in the things they believe in. They tend to be intelligent, somewhat cynical, and usually have well-defined principles that they will not stray from ever. Sometimes, this combination can lead to arrogance because of them insisting on how right they are without considering other points of view or whether or not they might be wrong.
I have no honest clue about the first part, but the second matches me remarkably well. I have strong views, even to the point that I offend others. And I always work to my principles. So I found your description extraordinarily accurate!