This is an interesting one because if you collect something the number of things you have doesn't seem so absurd.
Some would say my collection of tools is silly but every single one of them, except one, has been used. The one that hasn't been used is a drywall screw gun, and the only reason it hasn't been used yet is that I needed my drywall hung faster than I thought I could do it, so I paid someone to do it. The cutout tool has been used, as I needed to cut holes in the drywall to fit electrical back boxes. Almost every single one of my tools gets used in anger within a very short time of getting it home - when I bought my belt sander I went through nearly a dozen belts in the first month of owning it.