Does it matter really? We all would get killed by the protagonist, whether it be Luke Skywalker, John Marston, Jack from BioShock, or A RPG character that someone else created.
I would work for Aperture Science, because I could be a companion cube and die and be remade into another companion cube.
Or The League of Seven Evil Ex's, then I could get superpowers and kicks someones ass and when I die I will give change to the homeless, $4,542,857.37 to be exact just to be an A-hole!
EDIT: Even if we kill the protagonist he/she will just respond!