Maybe what I would discover instead, if I actually charted out my value structure, that all of the things I value exist in an interlocking network that doesn't ground out in any special real, true, honest-to-goodness, fundamental, basic, not-dependent-on-anything, terminal values.
It sounds like your value structure represents (hazily specified) terminal values.
It doesn't sound that way to me, so if you unpack it I'd be interested.
A few years ago, I wrote a little dialogue I imagined between 2 materialists, one of whom was for and one against abortion, centering on the personal identity question. I recently cleaned it up and added a number of references for the biological claims.
You can read it at An Abortion Dialogue.
Early feedback from #lesswrong is that it's a 'nicely enjoyable read' and 'quite good'. I hope everyone likes it, even if it doesn't exactly break new philosophical ground.