My first trip was a month or so after Oblivion opened. I was very young (12/13) and didnt really 'do' rides. The only coaster I had ever been on before that day was the grand national at blackpool (incidentally I now LOVE the GN) and I was terrified.
I got dragged onto blivvy by my mother (who was most upset she had spent a fortune to get in and so was determined her daughter was going on a ride) and I was absolutely pooing my pants. Cue one vertical drop later and I went on everything else that day inc Ripsaw and Nemesis etc. Seems Oblivion 'cured' me although its still the one ride I feel nervous on, I dont know why!?
Oh and to those who are too young or didnt go to AT around that time, X Sector really was as good as us oldies make it out to be, it really was like being in a different world
I really do hope they can recreate that feel with the update and The Smiler.