To be honest I never remember signing up for Pinside 11 years ago. But was going to use my nickname from when I was 5 years old: "twomees". Got that nickname from the next door neighbor kid, Mike, when he found out that I had the same EXACT first name as him. We had just moved into the house and he was confused someone else would have the same name as him; so he called me "two me's" or twomees.
But when I went to sign up on Pinside (apparently for the second time, duh), it said I already had an account as schudel5. That is simply just my last name and the number of people in our household. Boring, I know.