For me, there's the nature of suffering, and then there's the chance to do better. If reincarnation were something like those "go back to age X" hypotheticals, or an earlier incarnation, or has a more robust continued sense of "me" , I'd love a chance to do better, to better offset the harm of my existence. While I suffer a lot regularly in several ways, that's not what makes my life feel so unbearable (as someone who thinks they deserve punishment) so much as regret, guilt, and the wish to be better. If I could carry that forward, I'd be keen to reincarnate. And honestly if the cycles of redeath and rebirth involved a karmatic system of punishment and return toward samsara etc, I'd be on board too I think, on terms of my self loathing.