Saint's Row 2, (console versions) I would have hair and clothes move realistically. I find my character almost always seems like he's made of plastic for the stiffness of my long hair, Jesus beard, and what should be flowy robes. As such, I recently painted his face green and put together an all-green soldier outfit to look like one of those plastic army men. It's just not the same without green guns, though. [sub]Maybe the next mod would be colorful weapons...[/sub]
That's about it. Maybe remove some of the pricks with rocket launchers, but they might not stand a chance without explosives.