Some time ago I wrote about my love of seven point scales for measuring things (especially human attitudes). In the original article I mentioned John Ousterhout's scale for hiring people and Kinsey's scale of human sexuality.
I've come across a few more seven pointers:
1. In The God Delusion Dawkins presents a seven point scale for measuring how much you are a theist or atheist.
2. Then there's the Bristol Stool Scale describing the seven types of human faeces
3. And finally, The International Banana Association's ripeness scale.
Got any more?