I forget his name but I had a halfing rogue that viewed the world in terms of predator and prey, the strong survive the weak don't.
He was lawful to his personal code, and once you've made him a friend, he's a friend for life. Then the second you're dead he's gone.
Sadly, he was the first of the party to die so he never got to run off on them.
Also, this is from a friend. We're adapting old time Xcrawl for Pathfinder, and one of the character ideas he got was a gnome Luchadore.
I have since become mesmerized by this thought and should my current character die, will make it, though I might substitute halfling for gnome.