Say around the time Bruce was like three or four, the Waynes hit a big financial issue and basically lost everything, eventually stabilizing as a middle-class family, not completely poor but still pretty much reliant on Thomas's work as a doctor get by? Would they still end up being murdered? Would they break up due to the stress on their marriage? And what'd become of Alfred? In a nutshell, what sort of person would Bruce go up as under more routine conditions? Say for instance, Gotham is already a crime-hidden hellhole and you choose to read Bruce's issues as something pre-existing instead of specifically stemming from his parents' murder. Could you very easily see him falling into petty crime? Or maybe he'll eventually have some moment that does push him to re-evaluate things and try to make a difference. He could possibly do this by becoming a regular cop than looking into the whole superhero/costumed vigilante thing.