Then what sich most important factors to create a quality blog?

Original Content
Write an article about a topic you understand well enough so you can give as much information as possible. You will only generate an article of poor quality if you’re going to write about something that you yourself do not understand and maybe you do not.

Frequency
Write at least one interesting article every day, so the reader can see that you’re regularly posting quality content. Better to write one article a day instead of writing 10 posts in one day, then do not write anything for a week. These habits will help you to increase the number of readers quickly and to maintain communication with readers.

Avoid Spam
Do not give comment spam and do not receive a review of low quality websites.

Interact with your readers
Ask your readers what they think about something you wrote. And answer any comments from your readers. I’m not going back to a blog, if when I ask questions to the author of the article and not answered. Or when I give comments on a blog, then the owner of the blog is not back to visit our blog.

Show Your Personality
If you write an article about something, you write from your perspective. Do not get mad if some readers will disagree with you. Discuss about it, listen to your readers, and learn from the tips they give.

Have fun
If you do not like blogging and you can not have fun with blogging, do not do it. I consider blogging as a hobby and I have fun with practicing one of my hobbies. If we do something with “happy hearts”