I wonder if there's anything you can do, briefly to reveal the letter you're typing when you're entering passwords, before it disappears. This option is already there for Android devices, and Android is I understand a Linux variant.
I find it invaluable on my phone and it would be a great benefit in ubuntu for people like me, who type their letters in with a special stick and am not always sure whether I've hit the correct letter. So I'm frequently having to retype my password.
After all, I use my laptop in a chair in the corner and the only person who sees is the budgie.