This is all about 'keeping the faith' if the PS3 is supported long after the super successful PS4, people are more likely to be okay with buying a PS4 knowing it'll be supported long after the gen is over. Sony always do this, which is why they made sure 2013 was one of the greatest send-off years for a console (in terms of exclusives) I've seen.
There's only 2 races: White and 'Political Agenda'
2 Genders: Male and 'Political Agenda'
2 Hairstyles for female characters: Long and 'Political Agenda'
2 Sexualities: Straight and 'Political Agenda'