All amusement park rides. Yes all of them.
Well, not all of them. Just the kind that go fast enough to send people flying if it malfunctioned somehow. It seems uncomfortable to me to entrust my life to some machine as it flings me around all over the loving place. It's mostly because I am not in control of what it does to me. If I was somehow giving myself a ride very similar to a roller coaster or something, I would know if something was wrong with me in such a way that I would end up killing myself if I continued the ride, so I would stop. This machine how ever doesn't know if it's broken, and I have no idea what it will do to me. I can't even ride carousels anymore. ):
The ride I ever rode was a Ferris wheel, because the managers have way more control over it, and it seems overall more stable than a large disc spinning really fast.