Sometimes when you are looking to buy a new lens, it's helpful to know what focal length you tend to favour. You might also like to know what ISO, shutter settings etc are most used.

There is a free program called Wega which graphs and analyses your images and lets you know all sorts of detail about your shooting style. Just point it in the direction of a directory of images, and it will analyse them all and then tell you what sort of settings you use most.

http://www.wega2.vandel.nl/