Not quite like the first, but still fun
Gameplay:
The gameplay was fun, though not much like the first. It seemed to me a little too peaceful, in the first game people would be running and barfing, occasionally at my will a few dozen guests would "accidentally" perish on a ride, customers would be angry and I'd often leave a little island in the middle of a load of water with a train off of the island and exiting nmear the entrance... that costs 75 dollars to board, all that fun stuff. In RollerCoaster Tycoon 3 it was too quiet and peacefull, and in the Main Menu there was just a quiet little tune playing that really didn't resemble what I would make of my guests and park. Other than that being able to ride your own rides was verry fun, though of course it couldn't get near to really riding a ride, especially if you have lag. All the new required food stalls may drain you of money and make the game not too fun when a quarter of your park is dedicated to food.
Graphics:
The graphics I thought were great, but occasionally laggy, especially when you really build up your park. But hte individual models were fun to watch, since you could see their anger in their eyes. Also the new night time mode was loads of fun, you can make a glowing park with torches around to make a tropical scene, or just lamps for a more modern scene. I prefer jungle :)
Sound:
The sound I thought was good, the roller coaster sound on a huge fall was fun, but the screams didn't quite cut it for me this time, ot much to talk about with all the similarities in the game.
Overall I think it was an okay game, worth the money nowadays if you enjoyed teh first two, and if you were a fan of them you'll enjoy this.