During my first two visits to US in 1992 and 1996, Kongfrontation was out of action - broken down both times, I seem to remember.
The first time I got to ride it was in 1998 and I think it's just incredible. Such an amazing feat of engineering (no wonder it keeps breaking down). I think Jaws is boring and cheesy, and Earthquake is just boring. Kong is the first ride I head for now. I love MiB and T2, but I think Kong gives them a run for their money - pretty impressive when you consider its age. BTTF is definitely looking tired to me, as is ET - both cutting edge in their time.