I agree that Simulation Games are best played to live out anything you wouldn't normally do in real life. And that the necessity to perform bodily functions and whatnot can be a bit boring. I also didn't like in The Sims how you HAD to get married and have children. Still, it is nice to once in a while let loose and live a life that isn't your own.

One game that allows you do some of the things stated in the Original Post, and isn't technically a Simulation Game is Bully.

Your character, Jimmy Hopkins, is able to use bathrooms, drink (water and soda), eat, sleep, and do other things. However the only required one is sleeping. You have to be in bed by two am. Otherwise, you passes out and hobos take your shoes. One time, the hobos took my pants, and I had go from New Coventry all the way back to the school in underpants. I was searching for the 75 rubber bands, and hadn't gotten any of the nearby Save Points, and I was flat broke.