So, as for amusement parks...
I'm really not sure which was the first one I went to. However, my parents did take us on family trips to both Disney World and Disneyland when we were kids, as well as Busch Gardens Williamsburg. When we lived in Seattle, we would ride the small rides in the park by the Space Needle. -And the Space Needle was also a ride as far my brothers and I were concerned - it was always "fun" to stand on the "seam" where the restaurant rotated.
Once I was in high school, Kings Dominion - later Paramount's Kings Dominion - was that park of choice - mainly because it was just an hour and a half from home. I had a habit of going a lot - seven to ten times in one summer (and not buying a season pass!), then not going for a few years, but then cramming a bunch of visits in again another summer. The Volcano rocks! And the HyperSonic was cool too.
And there was that one visit to Universal Studios Florida when I was doing some work for Universal Studios Japan. We were given "fast passes" since we were staff, so... I managed to ride all of the roller-coasters in the park in just over a half-hour since I didn't have to wait in line. Needless to say, just because I could didn't mean I should have. I remember skipping dinner that night since I was still so dizzy from all the loops, free-falls and twists and turns.