Indeed, I totally agree, we're totally jumping the gun and running before walking on the whole "brain" issue.
They're only organic, so they are all going to run differently. It might not even be possible, in some way, I'm glad. I do love the concept though, as I said before.
Also that Assasin's Creed thing, now I don't know the whole story there, I'm sure it's based on some facts, but I understand that our DNA holds everything about us, except our memory. In fact, even most sci-fi movies I can remember (see the pun?)
where they "clone" some guy using DNA strands, the guy (or girl, whatever) doesn't usually have any memory, now if anyone can remember an example, please quote me on that (and there's that pun again). Though of course, even the sci-fi writers are merely speculating, it is strongly backed by the fact we have broken the "gene" code several years ago and as I understand it, one of the main conclusions from it was that only information about our make-up was stored in there, which to be honest, is a lot of information already, our strands aren't long enough to hold our history, and as was said before, it takes enough of our brains to store and process that information as it is. DNA is pretty damn tiny, we're talking on a molecular scale here.