The form of names chosen for email addresses has changed over the last decade. For personal accounts, people used to use cryptic and cutesy names, either something like CB handles or weird abbreviations that only the user understood. Nowadays people seem more likely to spell out their full names. Maybe people were scared of the Internet back in the day but now it seems normal. Another thing is that people used to use AOL and other services that limited the number of characters in your name, so abbreviations and numerals were essential.
In other news, people I know on MySpace are being weird and shocking.