What I have so far is that he is a hardened wastelander who does whatever he can to survive day after day. So he would join a gang to try and have a tight group of people that could help him survive. Although he sympathizes sometimes with other people as they are just trying to make it through just like him. Thats where things get fuzzy. I think that may be a good way to start. Have him side with the powder gangers in the beginning to hopefully try and keep them off his back while he deals with the other hardships of living in a post-apocalyptic world. I don't know what other personality traits he should have. I want him to be mostly a self serving sob who places his needs above others but I also want him to have a vulnerability. Something that makes him good at heart and this good part only comes out once in a while.
What do you think I should in terms of a vulnerablility? Also what reasons he may have for doing something? (ex: KIlling an innocent person) Lastly I need help in developing his motivation (besides survival, unless you believe thats sufficient) so suggestions as to what his motivation should be would be welcomed. Thanks in advance!