What are the criteria to conclude that the post is with quality?
The length? The statement? The point? The credibility of the writer? Or is it just upon the discretion of the reader?
I have seen this thread for a long time and it is my guide when writing good quality posts, here is the thread
https://bitcointalk.org/index.php?topic=1684035.0 carefully read all things and reading it is full length will allow you to gain knowledge and be a good quality poster.