I agree all tycoon games are good but i played roller coaster tycoon the most. I had a bunch of the expansion packs I cant remember which ones now. I like the original better then the new ones but thats just because the new ones are more complex and I'm to lazy to learn all the new controls.
We've got this one where I work. Or at least the original version. It's not bad,I can spend a few hours lost in just building and tearing down the terrain. My only complain is the camera/zoom kinda sucks espcially when trying to get to a particular area of the park.