My wife still needs to get in in the event of my demise. That's why the 1Password master password and the creds to my main machine are taped to the inside of the gun safe. If someone gets into that, we've got bigger security issues.
I took Edward Snowden's advice of using long phrase/sentences as the super security password, no crazy signs / punctuation marks required ;)
Snowden is correct on this. The super security password should have at least as much entropy as what is being protected.
The thing is: If you password is exposed once in one site, the rest of your passwords could be guessed eventually. Unless if you take some additional steps to make it really hard for anyone or any software to guess your password. See other comments on this thread.