Meteor would have to be my first choice. What draws me to it is sweeping those wonderful Chiclet drop targets. Second would be Flight 2000. Just trying to achieve multiball is a feat. Keeping the balls in play during multiball is the second hardest thing. The ball walker is just such a cool feature too. Third would have to be Flash Gordon. It is by far the fastest double level game out there. The art, sounds, and speech calls are what make it fantastic.
Jim