Another thing i've came up with is a series of random events that will give you a quest. I think it's kinda elaborated.
In some bars through the wasteland you can find a guy. If you approach him, you have to do it alone:
You see a thin man leaning towards his glass of whiskey. He's dressed in black, and the clothes makes him even thinner than he looks. He carries a rifle in his back, a revolver and you can see that he has another revolver too, but it's quite old and it looks like it hasn't been used in a long time. He wears a hat full of bulletholes and an old black cape. You try to see his face, but you can't see an inch of it because he has a mask, but when you watch him better you see he isn't wearing a mask. he has some kind of material pasted into his face, letting him open his mouth to drink. The "mask" resembles a skull, painted in white and black, but the most interesting feature of the face of the mysterious man is in his vibrant and cheerful eyes lurking behind the mask. You sit right next to him and decide that a little chat won't be a bad thing.
1-Hey, nice face, pal.
2-Are you shy or you try to be the freak of the town?
3-Hey, good fella. Hope you enjoy your drink. You look wasted.
After this, you start a conversation with Rodrigo Hidalgo, it's only a small conversation about some random thoughts you have and how you behave. From time to time he'll appear in other bars, where you talk with him. He would ask about what you are doing and what you have done, and he'll tell you back in a subtle way about himself.
Rodrigo: Look, amigo... Life sure is tought when you have a family to feed in the worst shithole of earth, specially when there are some stupid chicanos trying to fuck up your life. But i am good with these -He grabs his revolver- You know, since i was a kid weapons were the best. I was el mejor in my town, but bullets don't feed your family, so i had to do something about my dear Alicia and Teresa. I didn't want them to die starving in poverty while i could do something about it, so i tried all things i could do to bring a jornal at home... None of them was enough. But one day I found it! I helped an amigo in need and he talked about me to his folks. I had a job that allowed my family to have a good life, despite the dangers of course. But if you don't risk you neck nowdays, you won't have a chance to survive.
1-You got a point there.
2-Sometimes it's the best to care about yourself for the sake of your people.
3-They were dead wheight to you. You should have live free.
Conversations like these will make you understand things about Rodrigo and his thoughts. After the last conversation with him, he will give you a bottle of Tequila, and depending in how you responded him, he will say "Good:Here you have, amigo. It will make you better than me, hombre", "Neutral:Here you have, hombre. A little courtesy from you companion el señor Hidalgo", "Bad:Take this. Hope you drown on it, pequeño diablo". After this, you won't see him after advancing much in the game and gainig karma and popularity. After a lot, he will appear to you and telling you that someone hired him to kill you.You will have now the Quest: Friends with la Muerte After that, he tells you the truth: He is a professional Matador, an experienced killer that started his career long ago. First was protecting his townfolks and later killing enemies, but he was careless, and he started to gain a lot of notoriety. One night the town was attacked by a lot of riders lusting for revenge. While he was scorting his wife and daughter, the riders killed his daughter, making him rabid. He killed all the raiders, but after that, at a safe place, his wife asked if he was doing that to make a living. He told her the truth and the next morning, his wife tried to kill herself and him burning their house. His Wife died but he survivied with a lot of burn scars all over his body. After losing all he had in the world, he realised it was all his fault and that working as a farmer and die of starvation was better than living well working as a killer. He decided to carry his weight and guilt the rest of his life, working as a Matador and hoping that someone will put him to misery, even knowing that he'll never see his wife and daughter. He only wanted to be punished by someone skilled enough, but he was getting better at killing, so he abandoned his hope, becoming a souless wanderer in the wasteland... Until he met you. He was hired to kill you, but he wants to make it with honour, so he'll await for a duel in a canyon at 1 o'clock the next day. He will wait all the days that in forward in order to have his duel.
At this point, you can agree to have a solo duel or prepare an ambush to gun him when he appears. The next day, at 1 o'clock, he will talk with you before the duel. Depending on the mood you talked with him, he will tell you that you were a good friend, even if you didn't knew him well, that you were someone special that was there, or that you were a bastard, but someone that listened to his tormented laments. At this point, you can try to convince him to don't perform the duel, or to have the duel. If you convince him, he will ask if he can do something besides killing people. You can say him to use his skills for good joining the rangers or becoming a loner ghost that punishes people, or to leave his past life behind him to find something to live for.
If you have the duel, he'll thank you for putting him to misery with honour, despite that he'll be punished for all eternity in hell. After this, you can let the corpse be or dig him a grave with the tombstone "To the lone Matador".