[delluminatus]

Obstreperous doesn't mean "stubborn" (at least not in the definition given), it means that you are "defiant", and that defiance is stubbornly maintained. I don't think you did this deliberately, but it seems like a mistake to just assume "stubbornly defiant" == "stubborn".

edit to elaborate: IMO, "defiance" is a positive trait, because you have to be willing to defy others in order to be able to assert yourself. In that sense, it is an integral part of self-confident action. On the other hand, unqualified stubbornness is a sign of insecurity in my opinion. People use "stubborn" as a positive descriptor, but my experience is that stubbornness is a mistake based on an assumption that changing your opinion or ideas makes you seem weak.

So, I for one would like to describe myself as "stubbornly defiant" but not "stubborn" in general. I am only stubborn with respect to a few key things which I think should never be permitted to be compromised, and one of those is my independence and self-determinism. But I am not stubborn about ideas or even beliefs.