My favorite key is the “~”. I use it in most of my passwords. In the past many systems would not accept the “~” in a password. Recently this has not been a problem. However, I just got a new phone and realized that it does not have the “~” key when it allows you to enter a password. The phone allows for a “~” but not when entering a password.
Since my main password for work has a “~” in it, I can’t get into mail or even the system till I change it.