I also hate any drop rides. I use to go to the park with people who were afraid of the pirate ship that hangs you upside down (that did not bother me at all) but who would ride those drop towers (which I will not do after my trauma that was the Free Fall at Six Flags Over Georgia. Different people just see things differently sometimes. I'll take hanging upside down as an easier challenge compared to being dropped off to free fall down the side of a tower any day!
Edit - I forgot to add, even though I don't have a fear of mega rides or heights, I did second guess myself when the arm of the Insanity on top of the Stratosphere Tower in Las Vegas rotated out over the edge of the tower with the street 900 feet below. By the time the ride started spinning, it turned from doubt into adrenaline.
If you go to Vegas, you should ride each one of the three they have up there. If you really want to test your limits of putting your life in someone else's hands, do the Sky Jump.