Many think that passwords with random characters are more secure.
Truth is: "four random common words" make the best password - secure and easy to remembers! 
What is your password strategy?
Here are more facts about passwords and security: 
https://tutanota.com/blog/posts/how-create-strong-password
@Tutanota me? i have a one base for password, few suffixes and i use an interpunction inside.
easy to remember and practically i can have different passwords for different websites ;)