I would like the ability to rise through the ranks. I don't mean in the GTA sense where you just start working for someone with a bit more power....
This would mean you end up with people working for you, you can send them to kill people, deal drugs etc etc to make money for you. However, there are rival gangs and you can't go around killing them without repercussions. Eventually you end up as the kingpin of a city with maybe hundreds of guys under your control.