I didn't pick an option in the poll, cause none fits my situation, so I'll just write a reply instead. But to follow your structure of options, my answer would be "Yes - detransitioning".
And no, I don't think that's necessarily an obvious answer just because I'm detransing. I'm sure many detransitioned people would not undo having transitioned if they could. But I can't speak for them.
I thought about this during my transition, in which I lived fulltime from the moment I came out, then eventually went on hrt and had top surgery. It has been referred to as many things, the idea of such a pill, my favourite being "the cis pill" but it's essentially the same thing. Back then, I always answered "no" to if it would make me happy with my female bio sex, but "yes" if it would make me a cis male. I thought such a change would somehow turn me into a different person if it would make my mind female. Now I wonder about that, and I wonder just how female my brain really is.
I think maybe I took the "normal pill" in a sense. Well turns out I am a cis woman. And getting the realisation that I suddenly wanted to be and live as a woman again, and suddenly being fine with my female body traits, after a lifetime of having been dysphoric about them and wanting to live as a man... it's strange. And sad. Especially because I had already transitioned, so now I have to detransition to be truly fine with my body. I feel like a broken female now. I was complete once, but I didn't know it, so I threw it away. And I'm agonising over that now.
But if I could go back in time and never have transitioned in the first place, and always have been fine with being female and always thought of myself as a girl/woman, like I do now... I'd take that pill so fast. If I could have my natural body back, I'd be whole again, which I now may not ever become. I'll still try though.
As for the personality thing, I'm still the same person now as I was when I was dysphoric and thought of myself as a man. Only difference really, was the labels/terms I used for my gender and sexuality, the pronouns I attached to myself, the name I went by, which parts of my body I liked or disliked, and my style to some degree. But everything that's actually me, as a person... is the same darn mess. I recognise my brain just fine. The differences are minute, and insignificant to the full picture. So knowing that now, I would have spared myself the pain of an unnecessary transition if it was possible.
Sure I learned a lot of invaluable things from having gone through all that, and maybe I'm too newly out from the detransing closet to know if I'd truly want it all undone if that was possible, or treasure it as an important part of my past... but man, this is really painful. I don't know if I've even actually been through anything worse. It's a very long-lasting, drawn-out, constant pain that I can't possibly escape, it's a grief unlike anything I've ever felt before. Maybe I just said that I've been through worse before, to comfort myself. Well, at least I know how to survive through hardship: with tea and dark humour.
