I wish they would revive the tycoon games for pc. Transport tycoon, roller coaster tycoon and railroad tycoon used to be my favorites. However they were always limited by memory limitations, small maps and easily reached maximum number of units.
The last one I played was railroad tycoon 3 in 2003. Beautiful transition to 3D but lacking in depth that the original had, and the maps were still pretty small. Roller coaster tycoon never looked good in 3D, it was too early. A new attempt should be a lot better now. Tropico 3 turned out really well in 3D.
Designing a couple of great roller coasters that loop through each other, or one with a double track with synchronized starts for a race is a welcome break from killing and blowing things up all the time.