Revenge

I'll kill. I'll go all out my way and find whoever killed my best friend and find the best and suitable way to deal and cope with my friends death. I'll go as far as killing everyone else to get to my final enemy for my friend. THIS is acceptable, because I go by what I've read a long time ago. "You kill, you die". No one is going to take my friends away from me no matter what, because we're all legends, and legends never die. I will go really far, and search high and wide for my friends killer. (Romeo & Juliet, Mercuito death)

Suicide

Unacceptable in any way, shape or form. A life of someone should be cherished. I know in some religions or cultures, even cults its acceptable. Where if you kill yourself, you'll end up with 52 virgins, or even a new life. No one should die for any reason. No matter what, a life is given to you to live and to enjoy. Not to cut it short for any reason unnecessary.
On the other hand, I'ma live forever because a legend never dies. So take that.