I was never very good at SimCity. It only ever entertained me when I would start using cheats to make things easier, or if I watched a volcano engulf my entire populous. Others get into the whole architectural and city-planning thing more. Some really get into it:

The SimCity 3000 virtual metropolis of Magnasanti has six million Sims, which is the game's maximum. The city's creator -- who goes by Imperar V. Omnika -- claims that the original plans started in 2006, and that "the most advanced construction techniques were employed to achieve a near optimum population density." So, who wants to live there?