If you can be a staff member at your own park or others it would be great to add guest interactions. They can tell you their concerns and what you need to improve in your park for example. Most of the time guests are over looked in tycoon and other games so it would be great for them to have some personality and not just follow the same paths all of the time but make decisions on their own so that each guest is unique. I think it's these small details that count just as much as the larger details to make our theme parks alive [up]