I always find questions like this a bit problematic. To face facts, the majority of members of the imperium are, for want of a better term, rabble - peasants, underhivers, industrial workers etc... By statistics alone it's almost certain we would be either a home-front worker or, at best, cannon fodder. It's also kind of difficult insofar as education in the Imperium is nothing like what we have now, so while someone now might have a degree in engineering, it hardly means they would be an Imperial engineer.
To ruin the fun even more, i have an issue with this kind of view of 'you' if you were born under completely different conditions. After all, what are we classing as 'you' here? Your particular genetic composition? Your particular personality/ personal identity? If it's the former, then we cannot say what we would be, as we simply don't know enough about how our particular composition would turn out under vastly different conditions, and if it's the latter, then there would be no 'you' in 40k, as a large amount of our personal identity is determined by our sociocultural identity. For reasons of philosophy, i'm a personal identity skeptic, but regardless, it seems that unless you're willing to make some pretty big metaphysical claims regarding some immutable soul or abstracted Cartesian Identity, there is nothing that is a 'you' which can be hypothesised about.
Based on this answer alone, i think it's pretty evident that if there were some kind of 'me' in 40k, he would have been executed long ago for asking far too many questions...
(i'm not meaning to ruin this thread or sound dismissive towards anyone involved, I just thought i'd throw a couple of my thoughts on the matter out there. I hate that the internet is so incapable of conveying tone that I feel forced to add a disclaimer of this sort, but i'd rather that than be misconstrued.)