what's in a good blog post?

What's in a good blog post?
*Humor
*Strong use of voice
*Personality
*Relates to others
*Personal and Public
*Friendy :)
*Reflective
*Food for thought
     -question
     -sparks a thought
*Length (but i kind of disagree)
*Fairly informal

What's in a good comment?
*Apropriate, and respectful
*Claim them
*Not massive (typically)
*On topic
*Respond to the post
*If you want to say "great post!" Please explain why
*