According to University of Cambridge computer scientist; Dr Richard Clayton, e-mail addresses beginning with with "A", "M" or "S" get more spam than those starting with "Q" or "Z".
(Spammers seemed to like the letters, "A", "M", "S", "R" and "P". About 40% of all the messages arriving in the e-mail inboxes of accounts with addresses that had one of those characters as their first letter were junk. Much less popular were "Q", "Z" and "Y". For these cases, spam was about 20% or less.)