Not a gun. Don't own one, don't feel a need too.
I used to work with a guy a few years ago, who was one of those kids who sneak into dad's gun drawer when the parents are away. He accidentally shot himself through the head. Miracle he survived. Though he does suffer from a paralysed arm, as well as the anger issues than can accompany a TBI. Though cognitively he is still sharp as a tac. Nice guy as well, can lift more with his one arm than I can with both of mine, ha.
I don't have a problem with other people owning guns, but for myself. I prefer to keep something I can weild somewhat more effectively. Like a knife, of which I own several.
Otherwise I just try to do good preventative measures to protect myself from possible home invasion. Such as being very particular about who I bring to my house, security system, don't leave valuables visible through windows and have someone I trust take in my mail if I will be away for several days.
Not to mention, I have battled depression and suicidal thoughts on and off for years, while trying to avoid medication as much as possible. Being completely honest, sometimes I don't trust myself with a gun.