I prefer the kind where you don't get a butt burn and drown - ie, riding in a raft or some kind of coaster car.
When I was 7, I went to a waterpark. The first ride I rode was designed something like "The Everglides" and "Gulf Stream". I laid down on my back and slid down.
I almost drowned. Then I had to go to the hospital.
I got extreme burns and peeling skin on the entire back side of my body because of some kind of misunderstanding with the slide cleaner guy.
Never again did I ride any kind of slide again in my life.