Unfortunately, I am a very violent person.
No I wouldn't kill because I'm pissed of nor because I just wanted to.
I believe that if I were to be attacked, or robbed, or if someone tried to harm my family, I could most certainly defend myself. (As in kill them)
I have a fiery spirit, and the only thought that scares me is going to prison for it. If I could kill and not go to prison afterwards (We are all assuming it's self defense) then I wouldn't feel any guilt nor fear.
I guess part of this is because I don't believe in heaven nor hell, so there's nothing to fear afterlife wise, though I do believe in Karma. I think if you were killing someone with "bad" karma though (Such as a person that is a murderer for fun or robber, etc) then you shouldn't receive any bad karma in return for that.
Though as I've stated, murdering would not come hard for me, unless I had nothing to defend myself with and they had a gun or something, but even then I would try to get it from them and turn it on them, and if it happened just to be all out physical, I'm a woman soooo obviously I'd lose to a grown man if that's what I was up against. If I did by chance happen to have a knife, gun, other weapon or thing that could be used as a weapon, I think murder would be almost like second nature.