I don't own any, because for me guns go into the toy budget and there's not enough money there to support 'em right now.
There *is* actually hunting in New Jersey, but taking up hunting as a serious hobby would take more time and effort than it's worth.
Self-defense? Except against cops, a stick would be better, and I have one. Against cops in NJ you'd want heavy weapons, which would have to be made rather than bought anyway, unless your knowledge of the weapons black market is much better than mine.