With all the talk about getting one star or 5 stars, I wanted to point out a much more telling point. If you hover your pointer over the stars (or lack of stars) you will see how many folks actually rated the post.
It is interesting that a blog my have 50 views, and five stars.. When you hover over it, only one person actually rated the blog (and they thought it was excellent and gave the post 5 stars), thus the 5 star rating. You can see a blog that has 15 views, and 1 star, hover over the star(s) and you will see that 4 people rated it, all with one star.
Just a more telling view, in my very humble opinion, of what may actually be a good or a poor blog. Try it yourself, just because someone got 5 stars doesn't necessarily mean it is a 5 star blog, only that one person thought it was.
In that same vien, a blog can have 3 or 4 stars, and when you hover, you find out that many folks have rated it. Some may have rated it a 5 and some a 1, thus a 3 averaged out....
My advice, don't get too hung up on stars. And get all the information, not just a little bit.
Shelly