Are GUIDs good passwords? [closed]

Answer 1

Cons:

1. You will write them down somewhere.
2. You will probably email them, or write them down again if you need to tell anyone else.
3. They may be too long for certain systems.
4. They're practically impossible to memorize, so you might change them more frequently then desired.

So unless they're system passwords which change rarely, I doubt they are good passwords.