Simcity 4 is quite possibly the most addictive game ever created. You can create any type of city you can imagine
The best feature is the region. You not only create cities, but you create metropolitan areas that are connected thru suburbs, smaller cities, and farmland. The cities work together. Citizens commute from one town or city to another thru the highway system. Its the best in a legendary series that has no competetion because maxis is the best at what they do.
If you really wanna up the anti, get the rush hour expansion kit too. It allows you to add light rail, and neighborhood roads to your arsenal.
The best part of simcity is its always changing. Simcity 4 has a massive community with too many incredible mods to try out. The sky truly is your limit with this game.