It turns out that emoticons are considered a symbol, so they can beef up your passwords and make them more secure in combination with letters and numbers. Here’s how.
Long time ago a friend of mine used a set of key press to generate a smiley face to put in his bios which ended up in a situation where he was not able to type in the same smiley face into the password prompt. I had to teach him to reset his bios battery to get back into the bios.