Combine the freedom to roam a city and kill ppl from GTA; the first person view, weapons and physics of something like Rainbow Six; the graphics, carlist and car physics from Gran Turismo 4 but add in-car-view; the car customization of NFS Underground 2; and the world image of something like FFXI (just modern), and I am sold. I would pay $100 for a copy of it. Even if it is single player.
As far as **** goes, that would be limited as to how it is used in GTA. i.e. Hookers&Strippers