Finally, we come to the nuts and bolts. How will this all work in regards to grouping, rewards, individuality, and so on? You know that issue with the ubiquitous Prophecies Monk hair buns? "Oh look, there's another one." It's not going to happen. Running across another character exactly like yours is something that's going to be nearly impossible -- and that goes way beyond physical characteristics. Between race, class, physical appearance, biography, and personal choices made during your story, there are literally thousands of combinations possible.