This was a good post with some great info. I wrote a post a while ago about what makes a good comment and how to construct meaningful ones that have some meat to them. Likewise I have been making an effort to reply to most all comments on my posts that have or add value. Like wise even though my upvoted is only worth a couple cents I like to show the users who do comment well that I appreciate them. Basically everything you covered here. Your post should set people on the path to good comment habits.