Speaking of overly hyped games, the one above any for me is Star Trek The Next Gen. I guess I hate every aspect of that game except the continuous right orbit / side ramp combo. Which is challenging. I cannot believe it generally ranks as high as it does.
Next is Theatre Of Magic. Granted, it has fast flow and a great toy. But the scoring is greatly biased towards bonus x. So much that no modes a worth playing except the centre ramp one that is stacked with multi-ball progress. And the wizard mode has got to be the poorest of any game that era.
Corvette. I don't see the point. Something wrong with the layout.
Underrated ones. Hmmmm. Almost any Williams title of the 90's is hyped aren't they. I havn't played enough of them (or Sterns) to point at a definitive sleeper, that is as good as the any top 10'er.