Not a fan of either, "nada" is not English, and "nix" is a slang term, unlikely to be known to foreign speakers (I didn't know about it myself). How about "nihil", it's an inter-lingual term and close to "nil" in sound.
you wrote: > You're right about null? being a problem. `Nothing` suggests an option > type. What about 'nada' or 'nix'?
