Hit the Windows button on your keyboard, Click on the account name in the top right corner, Click on Change account picture, Click on Users and look for Sign-in options.
You can change between text and picture password there.
I think the text password is only used to change the picture password. The picture password overrides the text password to login.
Windows 8 is okay. But it is more for people who have touch screen monitors, laptops or mobile devices i.e. phones and tablets. But for $45 I can't complain. This is how I got Windows 8 for $45 /watch?v=kwNHqbsckwY