A place

Before you pops a wide open empty plane with a smooth flat surface, stretching as far as your conscious vision can see. This is the base of your creation of a place, a setting upon which the action can take place. Will it be an entire world? A city? A wasteland? Heaven? Hell? Perhaps something smaller. A seedy tavern? The room of a sexually obsessed coed? The cubicle of a disgruntled employee? What rules will this plane of existence follow? What imaginations of simplicity or grandeur do you have in mind?