A great post.
It will probably be very helpful for newcomers like me.

Don't agree with the "don't disagree with the author" part though. I think that our opinions are more important than the upvotes / followers, and that an honest comment is not a bad comment. Quite the opposite, really..

Sure, being honest doesn't mean being rude. I believe you can say whatever you want, as long as you do that in a nice and pleasant way.