Steven Pinker's "My Genome, My Self" is a valuable reminder that
as well as a useful summary of the kinds of observations that lead to those conclusions, and wise advice for those who may (or may not) want to know more about their own genes. As Pinker points out, who one is is influenced by genes, but influenced as well by personal experiences, and by chance, so genes are relevant to the question of who one is but not the answer to that question.