I think we probably all have some really cool gameplay ideas. Some of them we play out in our games, but a lot of them we never get the time to do, so they just remain really cool ideas in our heads. ...
I've enjoyed working with a handful of "snob" sims to start a Build-A-City-Challenge. Seeing 7 snobs coping without heat, water of electricity was very entertaining. It's then been fun to see some of them have lively, energetic and persistently naughty toddlers :D