I found a fanfic once where the Waynes are only a middle-class family, so without the vast resources that enables Bruce to disconnect himself from society and focus entirely on avenging their deaths, he becomes an engineer who is a considerably better-adjusted individual of comfortable means and who helps out at inner-city community centers. Instead of spending his nights beating up criminals, he helps young people channel their anger and focus their talents so they won't become criminals.
It was actually background to a Dick/Jason friendship fic, so pretty awesome all around. I'll try and find it for you.