1. Sadism
Being 'God' in a game like The Sims usually makes you protective of your subjects - building up their careers, making sure their tummies are filled etc.. However, all power corrupts and absolute power corrupts absolutely. Therefore the gamer is occasionally driven to the dark side, to make the Sim's life unpleasant. My favourite sadistic Sim past times include: building a toilet in the living room - making all the Sims in the game too embarrassed to go to the toilet in front of each other thus inducing mass pant wetting and shameful sobs. Also good for dubious laughs is building a diving board on concrete and forcing your crying Sim to jump off it. This will lead to their death and an outbreak of mourning among your fellow Sims who will go and lament at the poor dead Sim's gravestone, wailing like Banshees. Intensely morbid but you have to do it at least once for the experience!