Free/business style of website localization?

Question

Design

Let's say there is a certain site, how is it better to write localization in a free style or strict for the user?
For example, let's take the registration form, where we enter the password and which of the proposed error options is more loyal to users (and even better):
General:
Password is not filled
Strict:
Password less than n characters
Weak password
Passwords do not match
Free:
Required/required password from n characters
The password will be cracked very quickly
Passwords are not very similar

Answer 1

Well, in fairness, there is no strict and free style. Specifically, of the proposed - "strict" is best. He is the most informative.
And here in free "passwords are not strongly similar" - in general a tin.

Answer 2

It also depends on the theme of the site, but in technical matters, in our case with logins and passwords, use a more understandable style so that there are no nuances with hacks later.

Answer 3

write "Add a couple more characters" so that this line is red until they write a normal password and then changes color to green.