I rarely rate things (i.e. songs, photos, etc.) but I rely on the ratings when doing research on some things, mostly apps, books and movies.
So I found this from stevenf pretty interesting:
As soon as an app has been rated more than once, it becomes mathematically very unlikely that it will ever see a 1 or 5 star overall rating again. So, it’s nearly pointless to have scales of 5 stars, 10 stars, or 100 stars, when all you really need is: “Liked it, Didn’t Like It, and Neutral”.
h/t: DaringFireball
