Transport tycoon was by far my favorite. Man the things you'd to to get oil halfway across the world. From the oil rig, by ship to a dock where a train takes it over land and through tunnels.
And then just following a concorde to see how fast it flew. Man, that game was one of my all time favorites, how have I fogotten about it?
Rollercoaster tycoon was also awesome fun. Going from as low as possible to as high of possible and twisting the tower to try and turn the track upside-down.