http://www.techradar.com/news/forget-everything-you-think-you-know-about-passwords

You log into your office PC or email account and a message pops up: it’s time to change your password. You roll your eyes, change ‘c0mpanyN4me13’ to ‘c0mpanyN4me14’, are rewarded with a green tick, and go about your business.

Deep down you know it’s not good practice, but the rules enforced by many online services make it the only way to create passwords you’ll actually remember.