For further insight into your Netflix rentals vs. those of the average Netflixer, check out
http://feedfliks.comAt first the FeedFliks gathering of information might seem a little invasive, but it is a sanctioned app from Netflix:
http://www.netflix.com/AppGallery---
You can tell all sorts of interesting things, such as I am paying the equivalent of $0.94 per DVD or $0.13 per title if Instant Watching is included.
I keep DVDs an average of 6 days (that includes delivery and return time). And I've rented 574 DVDs since my join date of January 2006.