Looking-back over my (non-)career, one striking aspect is that I have always been a hard-line extremist. And still am.
Whatever ideas I adopted, I pretty quickly took them to an extreme such that I could never find anybody else (in 'real life' or on paper) that took them quite as far as I did. (Still true.)
Of course, this meant that I was nearly-always wrong about things; but after all, wrongness is nearly universal - so that doesn't distinguish me from the norm.
However, the fact that I followed-through the wrongness and did not back-off to being 'moderate' and fuzzy when things started getting absurd, was exactly what brought me to abandon one wrong idea after another.
And once I had lived-through this experince of knowing the wrongness from-the-inside, it meant that I really knew why these things were wrong; and could then move-on.
Insofar as I have made any contributions, this is exactly why. I kept-on thinking and inferring until eventually the exact nature of my error/s became crystal clear.
So, while I am a bit ashamed, I mostly don't regret being so wrong about so many things; I don't see how else I personally would (in the end) have discovered something of truth and reality.