This can be whatever you want, even with real spaces instead of "_", don't use weird characters like \ or # or ' or ", I'll just remove them.

Why hard to guess, why not my email? you might ask.

The idea is to make it hard for someone to get to your passwords, don't make it easy for them by using your real name or your email address.

But, DO make it easy for you to remember.

Oh, I will make it lower case for simplicity.