"I personally am not conscious of my accent"

This quote by Jared Diamond suggests that he is not knowledgeable about his own accent. This might suggest that he is not familiar with the way he speaks and the way his words sound to others. It could likewise suggest that he is not aware of the local or cultural impacts that may exist in his speech. It could likewise suggest that he is not aware of any particular dialect or accent that he may have. This might be since he is not from a specific area or since he has actually been exposed to many different accents and dialects throughout his life. It could likewise imply that he is not knowledgeable about any particular accent or dialect that he might have picked up from his parents or other family members. Whatever the case, it is clear that Jared Diamond is not conscious of his own accent.