Everything is inherited except intelligence, right?
We have growing evidence that much of a person’s personality is inborn, based on studies done on identical twins who were separated at birth.
Inborn does not necessarily mean genetic. The “assembly” of the child in the womb may be even more important than the “blueprint” provided by the genes. This could explain much of the variation between people for which a gene or combination of genes cannot be found. Anyody who has ever assembled a building or model is aware that there is often great variance between the blueprint and the finished product. :)
IMHO, it is likely to mean that attempts to create exact duplicates of people by cloning are doomed to failure. The exact environment for the development of the fetus can never by duplicated.
It might also explain why some people appear to be “born gay,” when a gayness gene would seem to be likely to disappear as its carriers failed to reproduce over the generations.