It was the silly sort of thing a high schooler might adopt at the dawn of the ubiquity of the Internet. Since then, it has been used enough places so as to be difficult to switch, and carries with it the benefit of being short. That last bit, the brevity, is something I value as usernames are only increasing in length and complexity, compounding by the number of additional users over time; this makes it more valuable than how odd it is to start with.
It was the silly sort of thing a high schooler might adopt at the dawn of the ubiquity of the Internet. Since then, it has been used enough places so as to be difficult to switch, and carries with it the benefit of being short. That last bit, the brevity, is something I value as usernames are only increasing in length and complexity, compounding by the number of additional users over time; this makes it more valuable than how odd it is to start with.