Whenever "sandbox game" is mentioned, I always think of the building games like SimCity, Railroad Tycoon, etc. You know, build stuff, like in a sandbox.
I always think of destruction, rampage and violence. You know, like in a Sandbox ;-)
LOL - you got me there.
Edit: I guess I haven't played many of the other type of sandbox games, so I'm fairly limited to Morrowind and maybe some other one that skips my mind for now.