Ooh for me me it was probably my first ride on Nemesis, I was so scared but also really excited and I was only young. I managed to ride it and I enjoyed it.
However when I came to have a re-ride (after a bottle of Coke) I could not do it and I remember my dad giving a boost out of the Q-line!
My first drop-tower experience was also pretty scary but I didnt have time to think about what I was doing as there was no Q.
Ah yes and Alien Encounter was not very nice when I was younger and visited.
(And my first go on Vampire @ CWOA was nerve-racking but I loved it and it gets better every time)