There are a lot of people who collect uranium ore, so owning a meter is good for that. And I'm probably a nerd, but I like taking the Gamma Scout with me on trips, seeing the changes in b/g radiation corresponding to differing altitude and locale. (The GS measures down to a hundredth of a micro Sv)
If there's a nuclear attack, though, I can always go to a certain community college in my area that has a victoreen CDV. It's what they use in their chemistry "department"!