I came across this blog of a man talking about his (rather substantial) tool collection. He says that a well made tool is a work of art and has a large collection of photos and the histories of various important pieces.
Not sure if I can understand the part of the brain that makes people collect large numbers of tools; my father was one of them though. I guess that to an electronic engineer a computer and a soldering gun are all the tools I need.
Here is a link to a great post about Coop's tool collection.